JP2015037414A - Method for producing tea beverage - Google Patents
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- JP2015037414A JP2015037414A JP2014198481A JP2014198481A JP2015037414A JP 2015037414 A JP2015037414 A JP 2015037414A JP 2014198481 A JP2014198481 A JP 2014198481A JP 2014198481 A JP2014198481 A JP 2014198481A JP 2015037414 A JP2015037414 A JP 2015037414A
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- tea
- clay
- tea extract
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- 235000013616 tea Nutrition 0.000 title claims abstract description 210
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 80
- 239000004927 clay Substances 0.000 claims abstract description 147
- 239000000284 extract Substances 0.000 claims abstract description 101
- 150000001768 cations Chemical class 0.000 claims abstract description 74
- 239000000796 flavoring agent Substances 0.000 claims abstract description 55
- 235000019634 flavors Nutrition 0.000 claims abstract description 55
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims abstract description 24
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 23
- 239000002253 acid Substances 0.000 claims abstract description 19
- 239000001110 calcium chloride Substances 0.000 claims abstract description 19
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 19
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910001424 calcium ion Inorganic materials 0.000 claims abstract description 12
- 229910001629 magnesium chloride Inorganic materials 0.000 claims abstract description 12
- 229910001414 potassium ion Inorganic materials 0.000 claims abstract description 12
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910001425 magnesium ion Inorganic materials 0.000 claims abstract description 11
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 claims abstract description 5
- 241001122767 Theaceae Species 0.000 claims abstract 17
- 238000000034 method Methods 0.000 claims description 69
- RYYVLZVUVIJVGH-UHFFFAOYSA-N caffeine Chemical compound CN1C(=O)N(C)C(=O)C2=C1N=CN2C RYYVLZVUVIJVGH-UHFFFAOYSA-N 0.000 abstract description 90
- LPHGQDQBBGAPDZ-UHFFFAOYSA-N Isocaffeine Natural products CN1C(=O)N(C)C(=O)C2=C1N(C)C=N2 LPHGQDQBBGAPDZ-UHFFFAOYSA-N 0.000 abstract description 45
- 229960001948 caffeine Drugs 0.000 abstract description 45
- VJEONQKOZGKCAK-UHFFFAOYSA-N caffeine Natural products CN1C(=O)N(C)C(=O)C2=C1C=CN2C VJEONQKOZGKCAK-UHFFFAOYSA-N 0.000 abstract description 45
- 244000269722 Thea sinensis Species 0.000 description 163
- 235000009569 green tea Nutrition 0.000 description 50
- 235000013361 beverage Nutrition 0.000 description 48
- 235000020688 green tea extract Nutrition 0.000 description 37
- 229940094952 green tea extract Drugs 0.000 description 36
- 235000006468 Thea sinensis Nutrition 0.000 description 26
- 230000000052 comparative effect Effects 0.000 description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 23
- 230000002378 acidificating effect Effects 0.000 description 22
- 238000011156 evaluation Methods 0.000 description 19
- 238000004128 high performance liquid chromatography Methods 0.000 description 16
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 14
- 235000020333 oolong tea Nutrition 0.000 description 13
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 12
- 235000020279 black tea Nutrition 0.000 description 12
- 239000000706 filtrate Substances 0.000 description 12
- 238000012360 testing method Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- 239000000243 solution Substances 0.000 description 10
- 238000002156 mixing Methods 0.000 description 9
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 8
- 238000005119 centrifugation Methods 0.000 description 7
- 238000000605 extraction Methods 0.000 description 7
- 230000002401 inhibitory effect Effects 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- 239000012528 membrane Substances 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 239000002211 L-ascorbic acid Substances 0.000 description 6
- 235000000069 L-ascorbic acid Nutrition 0.000 description 6
- 229960005070 ascorbic acid Drugs 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 235000017557 sodium bicarbonate Nutrition 0.000 description 6
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 6
- 239000012141 concentrate Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 230000001629 suppression Effects 0.000 description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 239000001103 potassium chloride Substances 0.000 description 4
- 235000011164 potassium chloride Nutrition 0.000 description 4
- 150000001450 anions Chemical class 0.000 description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 3
- 235000019225 fermented tea Nutrition 0.000 description 3
- 235000013305 food Nutrition 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 230000001954 sterilising effect Effects 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- -1 Clarit 100G Chemical compound 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000000440 bentonite Substances 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- 239000011692 calcium ascorbate Substances 0.000 description 2
- 235000010376 calcium ascorbate Nutrition 0.000 description 2
- 229940047036 calcium ascorbate Drugs 0.000 description 2
- 239000004227 calcium gluconate Substances 0.000 description 2
- 235000013927 calcium gluconate Nutrition 0.000 description 2
- 229960004494 calcium gluconate Drugs 0.000 description 2
- MKJXYGKVIBWPFZ-UHFFFAOYSA-L calcium lactate Chemical compound [Ca+2].CC(O)C([O-])=O.CC(O)C([O-])=O MKJXYGKVIBWPFZ-UHFFFAOYSA-L 0.000 description 2
- 239000001527 calcium lactate Substances 0.000 description 2
- 235000011086 calcium lactate Nutrition 0.000 description 2
- 229960002401 calcium lactate Drugs 0.000 description 2
- 159000000007 calcium salts Chemical class 0.000 description 2
- BLORRZQTHNGFTI-ZZMNMWMASA-L calcium-L-ascorbate Chemical compound [Ca+2].OC[C@H](O)[C@H]1OC(=O)C(O)=C1[O-].OC[C@H](O)[C@H]1OC(=O)C(O)=C1[O-] BLORRZQTHNGFTI-ZZMNMWMASA-L 0.000 description 2
- NEEHYRZPVYRGPP-UHFFFAOYSA-L calcium;2,3,4,5,6-pentahydroxyhexanoate Chemical compound [Ca+2].OCC(O)C(O)C(O)C(O)C([O-])=O.OCC(O)C(O)C(O)C(O)C([O-])=O NEEHYRZPVYRGPP-UHFFFAOYSA-L 0.000 description 2
- 235000013353 coffee beverage Nutrition 0.000 description 2
- 238000010828 elution Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 210000002741 palatine tonsil Anatomy 0.000 description 2
- 239000012264 purified product Substances 0.000 description 2
- 230000001953 sensory effect Effects 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- PFTAWBLQPZVEMU-DZGCQCFKSA-N (+)-catechin Chemical compound C1([C@H]2OC3=CC(O)=CC(O)=C3C[C@@H]2O)=CC=C(O)C(O)=C1 PFTAWBLQPZVEMU-DZGCQCFKSA-N 0.000 description 1
- WMBWREPUVVBILR-WIYYLYMNSA-N (-)-Epigallocatechin-3-o-gallate Chemical compound O([C@@H]1CC2=C(O)C=C(C=C2O[C@@H]1C=1C=C(O)C(O)=C(O)C=1)O)C(=O)C1=CC(O)=C(O)C(O)=C1 WMBWREPUVVBILR-WIYYLYMNSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- RGHNJXZEOKUKBD-SQOUGZDYSA-M D-gluconate Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O RGHNJXZEOKUKBD-SQOUGZDYSA-M 0.000 description 1
- JVTAAEKCZFNVCJ-UHFFFAOYSA-M Lactate Chemical compound CC(O)C([O-])=O JVTAAEKCZFNVCJ-UHFFFAOYSA-M 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 206010041349 Somnolence Diseases 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 229940072107 ascorbate Drugs 0.000 description 1
- 239000011668 ascorbic acid Substances 0.000 description 1
- 235000010323 ascorbic acid Nutrition 0.000 description 1
- 229960005069 calcium Drugs 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- ADRVNXBAWSRFAJ-UHFFFAOYSA-N catechin Natural products OC1Cc2cc(O)cc(O)c2OC1c3ccc(O)c(O)c3 ADRVNXBAWSRFAJ-UHFFFAOYSA-N 0.000 description 1
- 235000005487 catechin Nutrition 0.000 description 1
- 229950001002 cianidanol Drugs 0.000 description 1
- 235000016213 coffee Nutrition 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- QUSSPXNPULRXKG-UHFFFAOYSA-N galleon Natural products O1C(=CC=2)C(OC)=CC=2CCCCC(=O)CCC2=CC=C(O)C1=C2 QUSSPXNPULRXKG-UHFFFAOYSA-N 0.000 description 1
- 229940050410 gluconate Drugs 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 235000020332 matcha tea Nutrition 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 230000000144 pharmacologic effect Effects 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012488 sample solution Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 108010038851 tannase Proteins 0.000 description 1
Landscapes
- Tea And Coffee (AREA)
Abstract
Description
本発明は茶飲料の製造方法に関し、さらに詳細には茶抽出物に、白土と、陽イオンとを接触させる工程を含む茶飲料の製造方法に関する。 The present invention relates to a method for producing a tea beverage, and more particularly to a method for producing a tea beverage comprising a step of bringing a tea extract into contact with white clay and a cation.
茶飲料やコーヒー飲料に含まれるカフェインは、その薬理作用により積極的に摂取して眠気を抑えたい等のニーズがある一方で、カフェイン摂取により睡眠や入眠を妨げられる可能性を懸念して、消費者の中にはカフェイン入り飲料、特に、茶飲料やコーヒー飲料を敬遠する者もいる。 While caffeine contained in tea and coffee beverages has a need for active intake due to its pharmacological action to reduce drowsiness, etc., there is a concern that caffeine may interfere with sleep and falling asleep. Some consumers shy away from caffeinated beverages, especially tea and coffee.
このため、茶抽出物からのカフェインの低減を目的とした様々な方法が検討されてきている。例えば、特許文献１には、カフェインを含有する水溶液を活性白土または酸性白土と接触させることにより、水溶液からカテキンの減少を抑えながらカフェインを除去する方法が開示されている。また、特許文献２には、茶抽出物とエタノール水溶物とを混合し、活性炭、酸性白土、または活性白土から選ばれる１種以上と接触させる工程と、タンナーゼで処理する工程を経て得られる風味が改良された精製緑茶抽出物が開示されている。
さらに、特許文献３には、茶抽出物をアルカリ性条件下で活性白土および／または酸性白土と接触させることにより、白土から茶抽出物へのミネラル成分の溶出を抑制した精製茶抽出物の製造方法が開示されている。
For this reason, various methods aimed at reducing caffeine from tea extracts have been studied. For example, Patent Document 1 discloses a method for removing caffeine from an aqueous solution while suppressing a decrease in catechin by bringing an aqueous solution containing caffeine into contact with activated clay or acidic clay. Patent Document 2 discloses a flavor obtained by mixing a tea extract and an aqueous ethanol solution and bringing them into contact with one or more selected from activated carbon, acid clay, or activated clay, and a process with tannase. Has disclosed a refined green tea extract.
Furthermore, Patent Document 3 discloses a method for producing a purified tea extract in which elution of mineral components from the clay to the tea extract is suppressed by bringing the tea extract into contact with activated clay and / or acid clay under alkaline conditions. Is disclosed.
しかしながら、特許文献１の技術を用いて茶飲料を製造すると、ミネラル成分の茶抽出物への溶出に伴い、得られた茶飲料の外観や香味が、カフェイン低減処理が施されていない本来の茶飲料と比較して劣る場合があることが判明した。また、特許文献２や特許文献３のような技術を用いて茶飲料を製造する場合は、使用した有機溶媒を除去する際の香気損失や、アルカリ性条件にするためのｐＨ調整剤の香味に対する影響などを考慮する必要があった。また特許文献３において添加するアルカリ物質やｐＨの条件によっては、白土の膨潤や白土の沈降性の低下などにより濁度が上昇する可能性もある。 However, when a tea beverage is produced using the technique of Patent Document 1, the appearance and flavor of the obtained tea beverage are not subjected to caffeine reduction treatment due to elution of the mineral component into the tea extract. It has been found that it may be inferior to tea beverages. Moreover, when manufacturing a tea drink using the technique like patent document 2 or patent document 3, the influence on the flavor of the flavor loss of the aroma loss at the time of removing the used organic solvent and alkaline condition is used. It was necessary to consider. Further, depending on the alkaline substance added in Patent Document 3 and the pH conditions, the turbidity may increase due to swelling of the clay or a decrease in the sedimentation property of the clay.
本発明は、外観や香味が通常の茶飲料と遜色ない、カフェインが低減された茶飲料をより簡便に製造する方法を提供することを目的とする。本発明はまた、外観や香味が通常の茶飲料と遜色ない程度に維持される、茶飲料の濁度低減方法や香味低減抑制方法を提供することも目的とする。 An object of the present invention is to provide a method for producing a tea beverage with reduced caffeine in appearance and flavor that is inferior to that of a normal tea beverage. Another object of the present invention is to provide a method for reducing the turbidity of a tea beverage and a method for suppressing the reduction of flavor so that the appearance and flavor of the tea beverage are maintained to the same extent as those of a normal tea beverage.
本発明者らは、茶飲料の製造方法において、茶抽出物に、白土と、陽イオンとを接触させる工程を含むことにより、カフェイン含有量を低減させつつ、通常の茶飲料と比較して遜色ない外観や香味を維持できることを見出した。 In the method for producing a tea beverage, the present inventors include a step of bringing the clay extract into contact with white clay and a cation, thereby reducing the caffeine content and comparing with a normal tea beverage. The inventor found that the appearance and flavor are inferior.
すなわち、本発明によれば以下の発明が提供される。
（１）茶抽出物に、白土と、陽イオンとを接触させる工程を含む、茶飲料の製造方法。
（２）茶抽出物に接触させる陽イオンの濃度が、茶抽出物に対して、０．０１〜５０ｍＭとなるように加えられる、（１）に記載の製造方法。
（３）茶抽出物に接触させる陽イオンの濃度が、茶飲料に対して、０．００４〜２０ｍＭとなるように加えられる、（１）に記載の製造方法。
（４）陽イオンが、飲食品として許容される１価および／または２価の陽イオンである、（１）〜（３）のいずれかに記載の製造方法。
（５）陽イオンが、カリウムイオン、カルシウムイオン、およびマグネシウムイオンからなる群から選択される一種または二種以上である、（１）〜（３）のいずれかに記載の製造方法。
（６）茶抽出物に陽イオンを接触させる工程が、茶抽出物に塩化カルシウムおよび／または塩化マグネシウムを加える工程である、（１）〜（３）のいずれかに記載の製造方法。
（７）茶抽出物に白土を接触させる工程が、ｐＨ４．０〜５．９で処理される工程である、（１）〜（６）のいずれかに記載の製造方法。
（８）白土が酸性白土である、（１）〜（７）のいずれかに記載の製造方法。
（９）茶抽出物に、白土と、陽イオンとを接触させる工程が、茶抽出物と、陽イオンを加えた白土とを接触させる工程である、（１）〜（８）のいずれかに記載の製造方法。
（１０）茶抽出物に、白土と、陽イオンとを接触させることを特徴とする、茶飲料の濁度低減方法。
（１１）茶抽出物に、白土と、陽イオンとを接触させることを特徴とする、茶飲料の香味低減抑制方法。
That is, according to the present invention, the following inventions are provided.
(1) A method for producing a tea beverage, comprising a step of bringing a white clay and a cation into contact with a tea extract.
(2) The production method according to (1), wherein the concentration of the cation brought into contact with the tea extract is added to the tea extract so as to be 0.01 to 50 mM.
(3) The production method according to (1), wherein the concentration of the cation brought into contact with the tea extract is added to the tea beverage so as to be 0.004 to 20 mM.
(4) The production method according to any one of (1) to (3), wherein the cation is a monovalent and / or divalent cation acceptable as a food or drink.
(5) The production method according to any one of (1) to (3), wherein the cation is one or more selected from the group consisting of potassium ion, calcium ion, and magnesium ion.
(6) The production method according to any one of (1) to (3), wherein the step of bringing the tea extract into contact with a cation is a step of adding calcium chloride and / or magnesium chloride to the tea extract.
(7) The production method according to any one of (1) to (6), wherein the step of bringing the clay into contact with the tea extract is a step of treatment at pH 4.0 to 5.9.
(8) The production method according to any one of (1) to (7), wherein the white clay is acidic white clay.
(9) In any one of (1) to (8), the step of bringing the tea extract into contact with the white clay and the cation is a step of bringing the tea extract into contact with the white clay to which the cation has been added. The manufacturing method as described.
(10) A method for reducing the turbidity of a tea beverage, characterized in that white clay and a cation are brought into contact with a tea extract.
(11) A method for inhibiting flavor reduction of a tea beverage, characterized in that white clay and a cation are brought into contact with a tea extract.
本発明の製造方法により製造された茶飲料は、カフェイン含有量が低減されつつも、白土処理による濁度上昇といった外観上の問題が抑制され、合わせて香味は通常の茶飲料と遜色ないことから、カフェインの摂取を控えつつ、茶飲料本来の香味を味わえる茶飲料をより簡便に製造できる点で有利である。 The tea beverage produced by the production method of the present invention has a reduced caffeine content, but suppresses appearance problems such as turbidity increase due to the clay treatment, and the flavor is not inferior to that of a normal tea beverage. Therefore, it is advantageous in that a tea beverage that can taste the original flavor of tea beverages can be more easily produced while refraining from taking caffeine.
茶飲料の製造方法
本発明の製造方法は、茶抽出物に、白土と、陽イオンとを接触させる工程を含む茶飲料の製造方法である。本発明の茶飲料の製造方法は、好ましくは、カフェイン低減茶飲料の製造方法である。
Method for Producing Tea Beverage The production method of the present invention is a method for producing a tea beverage including a step of bringing a tea extract into contact with white clay and a cation. The method for producing a tea beverage of the present invention is preferably a method for producing a caffeine-reduced tea beverage.
本発明の製造方法は、茶飲料中の濁度を低減できればどのような態様であってもよく、茶抽出物に、白土と、陽イオンとをどのような順序で接触させてもよい。この順序には、逐次および同時が含まれる。 The production method of the present invention may be in any form as long as the turbidity in the tea beverage can be reduced, and the clay may be brought into contact with the tea extract in any order. This order includes sequential and simultaneous.
本発明の製造方法は、特に限定されるものではないが、例えば、（ａ）陽イオンを加えた（接触させた）茶抽出物と、白土とを接触させる製造方法、（ｂ）茶抽出物と、陽イオンを加えた白土とを接触させる製造方法、（ｃ）白土を接触させた茶抽出物に、陽イオンを加える（接触させる）製造方法、または（ｄ）茶抽出物と、白土と、陽イオンとを同時に接触させる製造方法が挙げられる。 The production method of the present invention is not particularly limited. For example, (a) a production method in which a cation added (contacted) tea extract and white clay are contacted, (b) a tea extract. And a production method for contacting the clay with the cation added thereto, (c) a production method for adding (contacting) the cation to the tea extract with which the clay is contacted, or (d) the tea extract and the clay. And a production method in which a cation is contacted at the same time.
これらの中でも、本発明の製造方法は、前記（ｂ）の態様が好ましい。陽イオンを白土に加える工程と、茶抽出物と、陽イオンを加えた白土とを接触させる工程との間隔は、本発明の効果を奏する限り特に限定されるものではないが、例えば、10秒〜7時間、好ましくは10秒〜2時間である。前記（ｂ）の態様により製造された茶飲料は、カフェイン含有量を低減させつつ、通常の茶飲料と比較して遜色ない外観や香味をより維持できる。 Among these, the production method of the present invention is preferably the embodiment (b). The interval between the step of adding the cation to the white clay, and the step of bringing the tea extract into contact with the white clay to which the cation has been added is not particularly limited as long as the effect of the present invention is exerted. -7 hours, preferably 10 seconds to 2 hours. The tea drink manufactured by the aspect of said (b) can maintain the external appearance and flavor which are inferior compared with a normal tea drink, reducing caffeine content.
本発明の製造方法に用いられる茶抽出物は、特に限定されないが、通常の茶抽出液の調製に用いられている方法を用いて製造される茶抽出液やその濃縮液を用いることができる。例えば、茶葉と水（０〜１００℃）を混合接触させるか、あるいは、茶エキスや茶パウダーなどの茶抽出液の濃縮物や精製物を水（０〜１００℃）に混合または溶解させることにより、本発明の製造方法に用いられる茶抽出物を得ることができる。また、上記の茶抽出液と、上記の茶エキスや茶パウダーを混合したものを茶抽出物として本発明の製造方法に用いてもよい。茶葉と水を混合接触させた場合には、遠心分離や濾過などの分離手段を用いて茶葉と茶抽出液を分離することができる。 Although the tea extract used for the manufacturing method of this invention is not specifically limited, The tea extract manufactured using the method currently used for preparation of a normal tea extract and its concentrate can be used. For example, by mixing and contacting tea leaves and water (0 to 100 ° C.), or by mixing or dissolving a concentrate or purified product of tea extract such as tea extract or tea powder in water (0 to 100 ° C.) A tea extract used in the production method of the present invention can be obtained. Moreover, you may use what mixed said tea extract and said tea extract and tea powder as a tea extract for the manufacturing method of this invention. When the tea leaves and water are mixed and contacted, the tea leaves and the tea extract can be separated using a separation means such as centrifugation or filtration.
茶抽出液の調製に用いられる茶葉は、特に限定されないが、Camellia sinensisに属する茶葉を用いることができ、煎茶、玉露、抹茶、釜炒り茶、番茶、ほうじ茶等の緑茶葉のような不発酵茶に限らず、烏龍茶のような半発酵茶や、紅茶のような発酵茶、プーアル茶のような後発酵茶等も用いることができる。また、抽出液の調製に際し茶葉以外の任意の原料を配合してよい。本発明の製造方法に用いられる茶抽出物に用いられる茶葉は、上記のような茶葉であれば特に限定されるものではないが、好ましくは緑茶、烏龍茶、または紅茶であり、より好ましくは緑茶である。 The tea leaves used for the preparation of the tea extract are not particularly limited, but tea leaves belonging to Camellia sinensis can be used, and non-fermented teas such as green tea leaves such as sencha, gyokuro, matcha tea, roasted tea, bancha and roasted tea Not limited to this, semi-fermented tea such as oolong tea, fermented tea such as black tea, post-fermented tea such as puer tea, and the like can also be used. Moreover, you may mix | blend arbitrary raw materials other than a tea leaf in the case of preparation of an extract. The tea leaves used in the tea extract used in the production method of the present invention are not particularly limited as long as they are the above tea leaves, but are preferably green tea, oolong tea, or black tea, more preferably green tea. is there.
茶エキスや茶パウダーなどの茶抽出液の濃縮物や精製物としては、ポリフェノン（三井農林社製)やサンフェノン(太陽化学社製)、テアフラン（伊藤園社製）などの市販品を用いることができる。また、これらの茶濃縮物や茶精製物は、そのまま又は水で溶解もしくは希釈したものを単独で使用しても、複数の種類を混合して用いても、茶抽出液と混合して用いてもよい。 Commercially available products such as polyphenone (manufactured by Mitsui Norinsha), sunphenon (manufactured by Taiyo Kagaku Co., Ltd.), and Tearfuran (manufactured by ITO EN Co., Ltd.) can be used as concentrates and purified products of tea extracts such as tea extract and tea powder. . In addition, these tea concentrates and tea refined products may be used as they are or dissolved or diluted with water, or may be used in combination with a plurality of types, or mixed with tea extract. Also good.
本発明の製造方法において、茶抽出物に白土を接触させる方法は、茶抽出物が白土と接触する限り、特に限定されるものではないが、例えば、接触タンクにより一定量を逐次処理するバッチ処理や、配管内でのドージングおよびホールディングによる処理や白土充填カラムを通液させるカラム処理などの連続処理が挙げられる。 In the production method of the present invention, the method for bringing the tea extract into contact with the white clay is not particularly limited as long as the tea extract comes into contact with the white clay. For example, batch processing in which a certain amount is sequentially processed by a contact tank. In addition, continuous treatment such as treatment by dosing and holding in a pipe and column treatment in which a clay-filled column is passed through may be mentioned.
本発明の製造方法において用いられる白土は、酸性白土、活性白土、ベントナイト、活性ベントナイトおよびこれらの一部または全部の組合せが挙げられる。好ましくは、酸性白土および活性白土並びにこれらの組合せを用いることができ、より好ましくは酸性白土を用いることができる。 Examples of the clay used in the production method of the present invention include acidic clay, activated clay, bentonite, activated bentonite, and combinations of some or all of these. Preferably, acid clay and activated clay and combinations thereof can be used, and more preferably, acid clay can be used.
本発明の製造方法の好ましい態様において用いられる酸性白土および活性白土は、共に一般的な化学成分として、ＳｉＯ2 、Ａｌ2Ｏ3 、Ｆｅ2Ｏ3 、ＣａＯ、ＭｇＯなどを有するが、本発明の製造方法に使用する場合、ＳｉＯ2 ／Ａｌ2Ｏ3 比は、３〜１２、好ましくは３〜８が好ましい。また、酸性白土および活性白土中に、Ｆｅ2Ｏ3 ２〜５質量％、ＣａＯ ０〜１．５質量％、ＭｇＯ １〜７質量％などを含有する組成のものが好ましい。 The acidic clay and the activated clay used in the preferred embodiment of the production method of the present invention both have SiO 2 , Al 2 O 3 , Fe 2 O 3 , CaO, MgO, etc. as general chemical components. When used in the production method, the SiO 2 / Al 2 O 3 ratio is preferably 3 to 12, preferably 3 to 8. Further, in an acidic clay and active clay, Fe 2 O 3 2 to 5 wt%, CaO 0 to 1.5 mass%, having composition containing such MgO 1 to 7 wt% preferred.
本発明に使用する酸性白土および活性白土の比表面積（ｍ２／ｇ）は、酸性白土の場合には５０ｍ２／ｇ以上１５０ｍ２／ｇ未満、活性白土の場合には７０ｍ２／ｇ以上３００ｍ２／ｇ未満であるものが好ましい。 The specific surface area (m 2 / g) of the acid clay and activated clay used in the present invention is 50 m 2 / g or more and less than 150 m 2 / g in the case of acid clay, and 70 m 2 / g or more and 300 m in the case of activated clay. Those less than 2 / g are preferred.
本発明に使用する白土のうち好ましいものとしては、比表面積（ｍ２／ｇ）が５０以上１５０未満で、かつ、ＳｉＯ２／Ａｌ２Ｏ３比が３以上８未満である酸性白土や、比表面積（ｍ２／ｇ）が２００以上３００未満で、かつ、ＳｉＯ２／Ａｌ２Ｏ３比が３以上１１未満である活性白土が挙げられる。 Among the clays used in the present invention, preferred are acid clays having a specific surface area (m 2 / g) of 50 or more and less than 150 and a SiO 2 / Al 2 O 3 ratio of 3 or more and less than 8, Examples include activated clay with a surface area (m 2 / g) of 200 or more and less than 300 and a SiO 2 / Al 2 O 3 ratio of 3 or more and less than 11.
上記のような好ましい酸性白土としては、例えば、ミズカエース＃２０やミズカエース＃２００、ミズカエース＃４００、ミズカエース＃６００、ミズライト（水澤化学社製）などの市販品を用いることができる。また、上記のような好ましい活性白土としては、例えば、ガレオンアースＮＶＺやガレオンアースＶ２、ガレオンアースＮＦ２（水澤化学社製）などの市販品を用いることができる。また、Ｃｌａｒｉｔ１００ＧやＣｌａｒｉｔ１２５Ｇ、Ｔｏｎｓｉｌ５３１Ｎ（ズードケミー触媒社製）などの市販ベントナイトも白土として用いることができる。 Examples of preferred acidic clay as described above include commercial products such as Mizuka Ace # 20, Mizuka Ace # 200, Mizuka Ace # 400, Mizuka Ace # 600, and Mizrite (manufactured by Mizusawa Chemical Co., Ltd.). Moreover, as preferable active clay as described above, for example, commercially available products such as Galeon Earth NVZ, Galeon Earth V2, and Galeon Earth NF2 (manufactured by Mizusawa Chemical Co., Ltd.) can be used. Commercially available bentonite such as Clarit 100G, Clarit 125G, and Tonsil 531N (manufactured by Zude Chemie Catalysts) can also be used as white clay.
本発明の製造方法において、茶抽出物と、白土との接触時間、接触時の温度、および接触させる白土の量は特に限定されるものではなく、茶抽出物中のカフェインを除去できれば、接触時間、接触時の温度、および接触させる白土の量はどのようなものであってもよいが、例えば、茶抽出物と、白土との接触時間は1秒〜３０分間であり、茶抽出物と、白土との接触時の温度は０〜３０℃であり、また茶抽出物と接触させる白土の量は、茶葉１０ｇから抽出された茶抽出液からなる茶抽出物４００ｇに対して、２〜４０ｇであり、好ましくは、茶抽出物と、白土との接触時間は1秒〜１０分間であり、茶抽出物と、白土との接触時の温度は０〜２５℃であり、また茶抽出物と接触させる白土の量は、茶葉１０ｇから抽出された茶抽出液からなる茶抽出物４００ｇに対して、４〜２０ｇである。 In the production method of the present invention, the contact time between the tea extract and the white clay, the temperature at the time of contact, and the amount of the white clay to be contacted are not particularly limited as long as caffeine in the tea extract can be removed, The time, the temperature at the time of contact, and the amount of the white clay to be contacted may be anything. For example, the contact time between the tea extract and the white clay is 1 second to 30 minutes, The temperature at the time of contact with the white clay is 0 to 30 ° C. The amount of the white clay to be contacted with the tea extract is 2 to 40 g with respect to 400 g of the tea extract made of the tea extract extracted from 10 g of tea leaves. Preferably, the contact time between the tea extract and the white clay is 1 second to 10 minutes, the temperature at the time of contact between the tea extract and the white clay is 0 to 25 ° C., and the tea extract The amount of white clay to be contacted consists of a tea extract extracted from 10 g of tea leaves. Respect extract 400 g, a 4～20G.
本発明の製造方法において、茶抽出物と、白土との接触時のｐＨは、茶抽出物中のカフェインを除去できれば特に限定されるものではないが、ｐＨ４．０〜５．９であることが好ましい。従って、茶抽出物に白土を接触させる工程は、好ましくはｐＨ４．０〜５．９で処理される工程である。また、白土が酸性白土の場合には、茶抽出物と酸性白土とを接触させる場合のｐＨは４．５〜５．９であることが好ましく、白土が活性白土である場合には、茶抽出物と活性白土とを接触させる場合のｐＨは４．０〜５．４であることが好ましい。 In the production method of the present invention, the pH at the time of contact between the tea extract and the white clay is not particularly limited as long as caffeine in the tea extract can be removed, but the pH is 4.0 to 5.9. Is preferred. Therefore, the step of bringing the clay extract into contact with the white clay is preferably a step of treatment at pH 4.0 to 5.9. When the clay is acidic clay, the pH when the tea extract is contacted with the acidic clay is preferably 4.5 to 5.9. When the clay is activated clay, the tea extraction is performed. It is preferable that pH in the case of bringing a thing and activated clay into contact is 4.0 to 5.4.
本発明の製造方法において、茶抽出物に接触させる陽イオンは、本発明の効果を奏し、飲食品として許容されるものであれば特に限定されるものではないが、好ましくは、１価の陽イオン（例えば、カリウムイオン、ナトリウムイオン）、２価の陽イオン（例えば、カルシウムイオン、マグネシウムイオン）、および３価の陽イオン（例えば、アルミニウムイオン）であり、これらの中でも飲食品として許容される１価の陽イオンおよび／または２価の陽イオンがより好ましく、２価の陽イオンが特に好ましい。１価の陽イオンの中でも、カリウムイオンが好ましい。また、２価の陽イオンの中でも、カルシウムイオンまたはマグネシウムイオンが好ましく、カルシウムイオンがより好ましい。 In the production method of the present invention, the cation brought into contact with the tea extract is not particularly limited as long as it has the effects of the present invention and is acceptable as a food or drink, but preferably a monovalent cation. Ion (for example, potassium ion, sodium ion), divalent cation (for example, calcium ion, magnesium ion), and trivalent cation (for example, aluminum ion), and among these, it is acceptable as a food or drink. Monovalent cations and / or divalent cations are more preferred, and divalent cations are particularly preferred. Of the monovalent cations, potassium ions are preferred. Of the divalent cations, calcium ions or magnesium ions are preferable, and calcium ions are more preferable.
本発明の製造方法において、茶抽出物に接触させる陽イオンとして、塩として加え（添加され）、陽イオンが茶抽出物中に存在するようにしてもよい。塩は、無機塩および有機塩のいずれでもよいが、例えば、塩化物、グルコン酸塩（例えば、グルコン酸カルシウム）、アスコルビン酸塩（例えば、アスコルビン酸カルシウム）、および乳酸塩（例えば、乳酸カルシウム）が挙げられ、好ましくは、塩化カルシウムおよび／または塩化マグネシウムであり、より好ましくは、塩化カルシウムである。 In the production method of the present invention, the cation to be brought into contact with the tea extract may be added (added) as a salt so that the cation is present in the tea extract. The salt may be either an inorganic salt or an organic salt, for example, chloride, gluconate (eg, calcium gluconate), ascorbate (eg, calcium ascorbate), and lactate (eg, calcium lactate). And preferably calcium chloride and / or magnesium chloride, and more preferably calcium chloride.
本発明の製造方法において、茶抽出物に接触させる陽イオンの濃度は、本発明の効果を奏する限り特に限定されるものではないが、好ましくは、茶抽出物に対して、０．０１〜５０ｍＭ、より好ましくは０．０１〜１０ｍＭ、さらに好ましくは０．０１〜１ｍＭとなるように加えられる。 In the production method of the present invention, the concentration of the cation brought into contact with the tea extract is not particularly limited as long as the effect of the present invention is exhibited, but preferably 0.01 to 50 mM with respect to the tea extract. More preferably 0.01 to 10 mM, and still more preferably 0.01 to 1 mM.
また、本発明の製造方法で得られた茶飲料は、配合工程、充填工程、殺菌工程などの工程を経て容器詰め茶飲料として提供することもできる。茶抽出物に接触させる陽イオンの濃度は、本発明の効果を奏する限り特に限定されるものではないが、好ましくは、茶飲料に対して、０．００４〜２０ｍＭ、より好ましくは０．００４〜１０ｍＭ、さらに好ましくは０．００４〜１ｍＭとなるように加えられる。 Moreover, the tea drink obtained by the manufacturing method of this invention can also be provided as a container-packed tea drink through processes, such as a mixing | blending process, a filling process, and a sterilization process. The concentration of the cation to be brought into contact with the tea extract is not particularly limited as long as the effect of the present invention is exhibited, but is preferably 0.004 to 20 mM, more preferably 0.004 to the tea beverage. It is added so that it may become 10 mM, More preferably, it is 0.004-1 mM.
本発明の製造方法で得られた茶飲料は、処理前の茶抽出物と比較してカフェイン含有量が６０％以上（好ましくは、９０％以上）低減されたものとすることができる。また、茶抽出物や茶飲料のカフェイン含有量は、高速液体クロマトグラフィー法（ＨＰＬＣ法）により測定することができる。また、本発明の製造方法で得られた茶飲料のカフェイン含有量（濃度）は、例えば１０ｍｇ／１００ｍｌ以下、好ましくは、２ｍｇ／１００ｍｌ以下、さらに好ましくは１ｍｇ／１００ｍｌ以下である。 The tea beverage obtained by the production method of the present invention can have a caffeine content reduced by 60% or more (preferably 90% or more) as compared with the tea extract before treatment. Moreover, the caffeine content of a tea extract or a tea beverage can be measured by a high performance liquid chromatography method (HPLC method). The caffeine content (concentration) of the tea beverage obtained by the production method of the present invention is, for example, 10 mg / 100 ml or less, preferably 2 mg / 100 ml or less, more preferably 1 mg / 100 ml or less.
本発明の製造方法で得られた茶飲料は、陽イオンを加えずに白土処理した場合の外観よりも濁度が低減して、好ましいものとなる。すなわち、本発明の茶飲料の濁度値は、陽イオンを加えずに白土処理した場合の濁度値より低い値が期待できるものである。濁度の低減は、陽イオン無添加の茶飲料の濁度と、陽イオン添加の各種茶飲料の濁度とを測定し、陽イオン無添加試験区の濁度値から陽イオン添加試験区の濁度値を減じ、この減じた値を陽イオン無添加試験区の濁度値で除して得られた濁度低減率により評価することができる。濁度の測定は当業者に周知であり、例えば、市販されている分光光度計により測定することができる。本発明の製造方法で得られた茶飲料は、その濁度低減率を１０％以上とすることができる。 The tea beverage obtained by the production method of the present invention is preferable because it has a lower turbidity than the appearance when treated with clay without adding cations. That is, the turbidity value of the tea beverage of the present invention can be expected to be lower than the turbidity value when the clay is treated without adding cations. Turbidity is reduced by measuring the turbidity of cation-free tea beverages and the turbidity of various cation-added tea beverages. The turbidity value is reduced, and the reduced value can be evaluated by the turbidity reduction rate obtained by dividing the reduced value by the turbidity value of the cation-free test group. The measurement of turbidity is well known to those skilled in the art, and can be measured by, for example, a commercially available spectrophotometer. The tea beverage obtained by the production method of the present invention can have a turbidity reduction rate of 10% or more.
本発明の製造方法で得られた茶飲料は、陽イオン添加の際に陰イオンも添加される場合には、陰イオンの含有量が通常の茶飲料より高濃度で含まれている可能性があり、本発明の製造方法により製造された茶飲料と考えることもできる。本発明の製造方法で得られた茶飲料中の陰イオンの含有量は各種分析装置を用いて測定することができる。 The tea beverage obtained by the production method of the present invention may contain a higher concentration of anions than normal tea beverages when anions are also added during the addition of cations. Yes, it can also be considered as a tea beverage produced by the production method of the present invention. The content of anions in the tea beverage obtained by the production method of the present invention can be measured using various analyzers.
本発明の製造方法で得られた茶抽出物は、カフェインが低減されつつ、茶飲料本来の香味や外観が維持され、香味や外観は通常の茶飲料と比較して遜色がないものである。従って、本発明の製造方法で得られた茶飲料はそのまま飲料として提供することができるが、配合工程、充填工程、殺菌工程などの工程を経て容器詰め飲料として提供することができる。すなわち、本発明によれば、本発明の製造方法により茶飲料を製造し、次いで、該茶飲料を配合する工程を含む、容器詰め茶飲料の製造方法が提供される。 The tea extract obtained by the production method of the present invention maintains the original flavor and appearance of tea beverages while reducing caffeine, and the flavor and appearance are inferior to ordinary tea beverages. . Therefore, although the tea drink obtained by the manufacturing method of this invention can be provided as a drink as it is, it can be provided as a container-packed drink through processes, such as a mixing | blending process, a filling process, and a sterilization process. That is, according to the present invention, there is provided a method for producing a containerized tea beverage, which includes the steps of producing a tea beverage by the production method of the present invention and then blending the tea beverage.
上記配合工程では、容器詰め茶飲料に配合されうる各種任意成分（例えば、酸化防止剤、ｐＨ調整剤、保存料、香料）を添加してもよい。また、茶濃縮物や茶精製物を白土処理した場合には、容器詰め飲料に適した水を添加して茶飲料に適した濃度まで該茶抽出物を希釈してもよい。 In the blending step, various optional components (for example, an antioxidant, a pH adjuster, a preservative, and a fragrance) that can be blended in a container-packed tea beverage may be added. Moreover, when the tea concentrate or the tea refined product is treated with white clay, the tea extract may be diluted to a concentration suitable for the tea beverage by adding water suitable for the container-packed beverage.
また、上記配合工程で得られた配合液を常法に従って殺菌し、容器に充填することができる。殺菌は容器への充填前であっても充填後であってもよい。 Moreover, the compounded liquid obtained at the said compounding process can be sterilized according to a conventional method, and can be filled in a container. Sterilization may be before filling the container or after filling.
容器詰め飲料の容器とは、内容物と外気との接触を断つことができる密閉容器を意味し、例えば、ＰＥＴボトルや瓶等の透明容器や、缶や製紙容器等の不透明容器が挙げられる。本発明の茶飲料は、茶飲料の色合いを、容器を通して需要者に演出するため、透明あるいは半透明のＰＥＴボトル容器詰め飲料とすることが好ましい。 The container of the container-packed beverage means a sealed container capable of breaking the contact between the contents and the outside air, and examples thereof include transparent containers such as PET bottles and bottles, and opaque containers such as cans and papermaking containers. The tea beverage of the present invention is preferably a transparent or translucent PET bottle container-packed beverage in order to produce the color of the tea beverage to the consumer through the container.
本発明の製造方法の好ましい態様によれば、緑茶抽出物に対して０．０１〜５０ｍＭとなるように１価および／または２価の陽イオンを加えた酸性白土を、ｐＨ４．５〜５．９で接触させる工程を含む、緑茶飲料の製造方法が提供される。 According to a preferred embodiment of the production method of the present invention, acidic clay containing monovalent and / or divalent cations so as to be 0.01 to 50 mM with respect to the green tea extract has a pH of 4.5 to 5. The manufacturing method of the green tea drink including the process made to contact in 9 is provided.
本発明の製造方法の別の好ましい態様によれば、緑茶抽出物に対して０．０１〜５０ｍＭとなるようにカリウムイオン、カルシウムイオン、およびマグネシウムイオンからなる群から選択される一種または二種以上を加えた酸性白土を、ｐＨ４．５〜５．９で接触させる工程を含む、緑茶飲料の製造方法が提供される。 According to another preferred embodiment of the production method of the present invention, one or more selected from the group consisting of potassium ion, calcium ion, and magnesium ion to be 0.01 to 50 mM with respect to the green tea extract. There is provided a method for producing a green tea beverage, which comprises a step of contacting acidic clay with added pH at pH 4.5 to 5.9.
本発明の製造方法の別の好ましい態様によれば、緑茶抽出物に対して陽イオン濃度が０．０１〜５０ｍＭとなるように塩化カルシウムおよび／または塩化マグネシウムを加えた酸性白土を、ｐＨ４．５〜５．９で接触させる工程を含む、緑茶飲料の製造方法が提供される。 According to another preferred embodiment of the production method of the present invention, an acid clay containing calcium chloride and / or magnesium chloride so that the cation concentration is 0.01 to 50 mM with respect to the green tea extract, A method for producing a green tea beverage is provided, which comprises the step of contacting at ~ 5.9.
本発明の製造方法の別の好ましい態様によれば、緑茶飲料に対して０．００４〜２０ｍＭとなるように１価および／または２価の陽イオンを加えた酸性白土を、ｐＨ４．５〜５．９で接触させる工程を含む、緑茶飲料の製造方法が提供される。 According to another preferred embodiment of the production method of the present invention, an acidic clay containing monovalent and / or divalent cations so as to be 0.004 to 20 mM with respect to a green tea beverage has a pH of 4.5 to 5 A method for producing a green tea beverage is provided, comprising the step of contacting at .9.
本発明の製造方法の別の好ましい態様によれば、緑茶飲料に対して０．００４〜２０ｍＭとなるようにカリウムイオン、カルシウムイオン、およびマグネシウムイオンからなる群から選択される一種または二種以上を加えた酸性白土を、ｐＨ４．５〜５．９で接触させる工程を含む、緑茶飲料の製造方法が提供される。 According to another preferred embodiment of the production method of the present invention, one or more selected from the group consisting of potassium ions, calcium ions, and magnesium ions so as to be 0.004 to 20 mM with respect to the green tea beverage. There is provided a method for producing a green tea beverage, which comprises a step of bringing the added acidic clay into contact at pH 4.5 to 5.9.
本発明の製造方法の別の好ましい態様によれば、緑茶飲料に対して陽イオン濃度が０．００４〜２０ｍＭとなるように塩化カルシウムおよび／または塩化マグネシウムを加えた酸性白土を、ｐＨ４．５〜５．９で接触させる工程を含む、緑茶飲料の製造方法が提供される。 According to another preferred embodiment of the production method of the present invention, an acid clay containing calcium chloride and / or magnesium chloride so that the cation concentration is 0.004 to 20 mM with respect to the green tea beverage is added at pH 4.5 to A method for producing a green tea beverage is provided, comprising the step of contacting at 5.9.
本発明の製造方法の好ましい態様によれば、緑茶抽出物と、１価および／または２価の陽イオンを加えた活性白土を、ｐＨ４．０〜５．４で接触させる工程を含む、緑茶飲料の製造方法が提供される。 According to a preferred embodiment of the production method of the present invention, a green tea beverage comprising a step of bringing a green tea extract into contact with activated clay added with monovalent and / or divalent cations at a pH of 4.0 to 5.4. A manufacturing method is provided.
茶飲料の濁度低減方法および香味低減抑制方法
本発明の茶飲料の濁度低減方法は、茶抽出物に、白土と、陽イオンとを接触させることを特徴とする、茶飲料の濁度低減方法である。本発明の茶飲料の濁度低減方法は、好ましくは、カフェイン低減茶飲料の濁度低減方法である。本発明の方法を用いることにより、茶飲料の外観が通常の茶飲料と遜色ない程度に維持される。本発明の茶飲料中の濁度は、例えば分光光度計を用いて測定することができる。
Turbidity reduction method and flavor reduction suppression method for tea beverages The turbidity reduction method for tea beverages of the present invention is characterized in that white clay and cations are brought into contact with a tea extract. Is the method. The method for reducing turbidity of a tea beverage of the present invention is preferably a method for reducing turbidity of a caffeine-reduced tea beverage. By using the method of the present invention, the appearance of a tea beverage is maintained to the extent that it does not differ from a normal tea beverage. Turbidity in the tea beverage of the present invention can be measured using, for example, a spectrophotometer.
本発明の茶飲料の香味低減抑制方法は、茶抽出物に、白土と、陽イオンとを接触させることを特徴とする、茶飲料の香味低減抑制方法である。本発明の茶飲料の香味低減抑制方法は、好ましくは、カフェイン低減茶飲料の香味低減抑制方法である。本発明の方法により得られた茶飲料は、該茶飲料中のカフェイン含有量が低減され、かつ通常の茶飲料と遜色ない程度に茶飲料の香味が維持される。本発明において、香味とは茶が有する本来の香味を意味する。 The method for inhibiting flavor reduction of a tea beverage according to the present invention is a method for inhibiting flavor reduction of a tea beverage, characterized by bringing a tea extract into contact with clay and a cation. The method for suppressing flavor reduction of a tea beverage of the present invention is preferably a method for suppressing flavor reduction of a caffeine-reduced tea beverage. In the tea beverage obtained by the method of the present invention, the caffeine content in the tea beverage is reduced, and the flavor of the tea beverage is maintained to the extent that it is not inferior to that of a normal tea beverage. In the present invention, the flavor means the original flavor of tea.
本発明の茶飲料の濁度低減方法および香味低減抑制方法によれば、カフェイン含有量を処理前の茶抽出物と比較して６０％以上（好ましくは、９０％以上）低減させることができるとともに、白土処理によって生じる濁度の上昇が抑制され、香味や外観の変化が抑制される点で有利である。本発明の茶飲料の濁度低減方法および香味低減抑制方法は、上記の本発明の茶飲料の製造方法に関する記載に従って実施することができ、例えば工業的生産の際にも処理前の茶抽出物と比較したカフェイン含有量の低減割合（カフェイン除去率）を維持しながら実施することができる。 According to the turbidity reduction method and flavor reduction suppression method of the tea beverage of the present invention, the caffeine content can be reduced by 60% or more (preferably 90% or more) compared to the tea extract before treatment. At the same time, it is advantageous in that an increase in turbidity caused by the white clay treatment is suppressed, and changes in flavor and appearance are suppressed. The turbidity reduction method and flavor reduction suppression method of the tea beverage of the present invention can be carried out according to the description relating to the above-described method for producing the tea beverage of the present invention. For example, the tea extract before processing even in industrial production It can be carried out while maintaining the reduction rate (caffeine removal rate) of the caffeine content compared to.
本発明の茶飲料の濁度低減方法の好ましい態様によれば、緑茶抽出物に対して０．０１〜５０ｍＭとなるように１価および／または２価の陽イオンを加えた酸性白土を、ｐＨ４．５〜５．９で接触させることを特徴とする、緑茶飲料の濁度低減方法が提供される。 According to a preferred embodiment of the method for reducing turbidity of a tea beverage of the present invention, an acidic clay containing monovalent and / or divalent cations so as to be 0.01 to 50 mM with respect to a green tea extract, pH 4 A method for reducing turbidity of a green tea beverage is provided, which is characterized in that the contact is made at 5 to 5.9.
本発明の茶飲料の濁度低減方法の別の好ましい態様によれば、緑茶抽出物に対して０．０１〜５０ｍＭとなるようにカリウムイオン、カルシウムイオン、およびマグネシウムイオンからなる群から選択される一種または二種以上を加えた酸性白土を、ｐＨ４．５〜５．９で接触させることを特徴とする、緑茶飲料の濁度低減方法が提供される。 According to another preferred embodiment of the method for reducing turbidity of tea beverages of the present invention, the tea beverage is selected from the group consisting of potassium ions, calcium ions, and magnesium ions so as to be 0.01 to 50 mM with respect to the green tea extract. There is provided a method for reducing turbidity of a green tea beverage, characterized by contacting acidic clay added with one or more kinds at pH 4.5 to 5.9.
本発明の茶飲料の濁度低減方法の別の好ましい態様によれば、緑茶抽出物に対して陽イオン濃度が０．０１〜５０ｍＭとなるように塩化カルシウムおよび／または塩化マグネシウムを加えた酸性白土を、ｐＨ４．５〜５．９で接触させることを特徴とする、緑茶飲料の濁度低減方法が提供される。 According to another preferred embodiment of the method for reducing turbidity of a tea beverage of the present invention, an acid clay containing calcium chloride and / or magnesium chloride so that the cation concentration is 0.01 to 50 mM with respect to the green tea extract. Is provided at a pH of 4.5 to 5.9, and a method for reducing turbidity of a green tea beverage is provided.
本発明の茶飲料の濁度低減方法の別の好ましい態様によれば、緑茶飲料に対して０．００４〜２０ｍＭとなるように１価および／または２価の陽イオンを加えた酸性白土を、ｐＨ４．５〜５．９で接触させることを特徴とする、緑茶飲料の濁度低減方法が提供される。 According to another preferred embodiment of the method for reducing turbidity of tea beverages of the present invention, an acidic clay containing monovalent and / or divalent cations added so as to be 0.004 to 20 mM with respect to a green tea beverage, There is provided a method for reducing turbidity of a green tea beverage, characterized by contacting at pH 4.5 to 5.9.
本発明の茶飲料の濁度低減方法の別の好ましい態様によれば、緑茶飲料に対して０．００４〜２０ｍＭとなるようにカリウムイオン、カルシウムイオン、およびマグネシウムイオンからなる群から選択される一種または二種以上を加えた酸性白土を、ｐＨ４．５〜５．９で接触させることを特徴とする、緑茶飲料の濁度低減方法が提供される。 According to another preferred embodiment of the method for reducing turbidity of tea beverages of the present invention, a kind selected from the group consisting of potassium ions, calcium ions, and magnesium ions so as to be 0.004 to 20 mM with respect to green tea beverages. Alternatively, there is provided a method for reducing turbidity of a green tea beverage, wherein acidic clay added with two or more kinds is brought into contact at pH 4.5 to 5.9.
本発明の茶飲料の濁度低減方法の別の好ましい態様によれば、緑茶飲料に対して陽イオン濃度が０．００４〜２０ｍＭとなるように塩化カルシウムおよび／または塩化マグネシウムを加えた酸性白土を、ｐＨ４．５〜５．９で接触させることを特徴とする、緑茶飲料の濁度低減方法が提供される。 According to another preferred embodiment of the method for reducing turbidity of a tea beverage of the present invention, an acidic clay containing calcium chloride and / or magnesium chloride added to a green tea beverage so that the cation concentration is 0.004 to 20 mM. A method for reducing the turbidity of a green tea beverage is provided, which is characterized by contacting at a pH of 4.5 to 5.9.
本発明の茶飲料の濁度低減方法の別の好ましい態様によれば、緑茶抽出物と、１価および／または２価の陽イオンを加えた活性白土を、ｐＨ４．０〜５．４で接触させることを特徴とする、緑茶飲料の濁度低減方法が提供される。 According to another preferred embodiment of the tea beverage turbidity reducing method of the present invention, the green tea extract is contacted with activated clay added with monovalent and / or divalent cations at a pH of 4.0 to 5.4. A method for reducing turbidity of a green tea beverage is provided.
本発明の茶飲料の香味低減抑制方法の好ましい態様によれば、緑茶抽出物に対して０．０１〜５０ｍＭとなるように１価および／または２価の陽イオンを加えた酸性白土を、ｐＨ４．５〜５．９で接触させることを特徴とする、緑茶飲料の香味低減抑制方法が提供される。 According to the preferable aspect of the flavor reduction suppression method of the tea beverage of this invention, pH 4 is added to the acid clay which added the monovalent | monohydric and / or bivalent cation so that it might become 0.01-50 mM with respect to a green tea extract. A method for suppressing flavor reduction of a green tea beverage is provided, which is characterized in that it is brought into contact at 5 to 5.9.
本発明の茶飲料の香味低減抑制方法の別の好ましい態様によれば、緑茶抽出物に対して０．０１〜５０ｍＭとなるようにカリウムイオン、カルシウムイオン、およびマグネシウムイオンからなる群から選択される一種または二種以上を加えた酸性白土を、ｐＨ４．５〜５．９で接触させることを特徴とする、緑茶飲料の香味低減抑制方法が提供される。 According to another preferred embodiment of the method for inhibiting flavor reduction of a tea beverage of the present invention, the tea beverage is selected from the group consisting of potassium ions, calcium ions, and magnesium ions so as to be 0.01 to 50 mM with respect to the green tea extract. There is provided a method for suppressing a reduction in flavor of a green tea beverage, characterized in that acidic clay added with one or more types is brought into contact at pH 4.5 to 5.9.
本発明の茶飲料の香味低減抑制方法の別の好ましい態様によれば、緑茶抽出物に対して陽イオン濃度が０．０１〜５０ｍＭとなるように塩化カルシウムおよび／または塩化マグネシウムを加えた酸性白土を、ｐＨ４．５〜５．９で接触させることを特徴とする、緑茶飲料の香味低減抑制方法が提供される。 According to another preferred embodiment of the method for inhibiting flavor reduction of a tea beverage of the present invention, an acid clay containing calcium chloride and / or magnesium chloride so that the cation concentration is 0.01 to 50 mM with respect to the green tea extract. Is brought into contact at pH 4.5 to 5.9, and a method for suppressing the flavor reduction of a green tea beverage is provided.
本発明の茶飲料の香味低減抑制方法の別の好ましい態様によれば、緑茶飲料に対して０．００４〜２０ｍＭとなるように１価および／または２価の陽イオンを加えた酸性白土を、ｐＨ４．５〜５．９で接触させることを特徴とする、緑茶飲料の香味低減抑制方法が提供される。 According to another preferred embodiment of the method for suppressing flavor reduction of a tea beverage of the present invention, an acidic clay added with monovalent and / or divalent cations so as to be 0.004 to 20 mM with respect to a green tea beverage, Provided is a method for suppressing a flavor reduction of a green tea beverage, characterized by contacting at pH 4.5 to 5.9.
本発明の茶飲料の香味低減抑制方法の別の好ましい態様によれば、緑茶飲料に対して０．００４〜２０ｍＭとなるようにカリウムイオン、カルシウムイオン、およびマグネシウムイオンからなる群から選択される一種または二種以上を加えた酸性白土を、ｐＨ４．５〜５．９で接触させることを特徴とする、緑茶飲料の香味低減抑制方法が提供される。 According to another preferred embodiment of the method for inhibiting flavor reduction of a tea beverage of the present invention, a kind selected from the group consisting of potassium ions, calcium ions, and magnesium ions so as to be 0.004 to 20 mM with respect to a green tea beverage. Alternatively, there is provided a method for suppressing a reduction in flavor of a green tea beverage, wherein acidic clay added with two or more kinds is brought into contact at pH 4.5 to 5.9.
本発明の茶飲料の香味低減抑制方法の別の好ましい態様によれば、緑茶飲料に対して陽イオン濃度が０．００４〜２０ｍＭとなるように塩化カルシウムおよび／または塩化マグネシウムを加えた酸性白土を、ｐＨ４．５〜５．９で接触させることを特徴とする、緑茶飲料の香味低減抑制方法が提供される。 According to another preferred embodiment of the method for inhibiting flavor reduction of a tea beverage of the present invention, an acidic clay containing calcium chloride and / or magnesium chloride added to a green tea beverage so that the cation concentration is 0.004 to 20 mM. There is provided a method for suppressing a reduction in flavor of a green tea beverage, characterized by being brought into contact at pH 4.5 to 5.9.
本発明の茶飲料の香味低減抑制方法の好ましい態様によれば、緑茶抽出物と、１価および／または２価の陽イオンを加えた活性白土とを、ｐＨ４．０〜５．４で接触させることを特徴とする、緑茶飲料の香味低減抑制方法が提供される。 According to the preferable aspect of the flavor reduction suppression method of the tea beverage of this invention, the green tea extract and the activated clay added with monovalent and / or divalent cations are brought into contact at pH 4.0 to 5.4. There is provided a method for suppressing flavor reduction of a green tea beverage.
以下、実施例により本発明をより具体的に説明するが、本発明の技術的範囲はこれらの例示に限定されるものではない。 EXAMPLES Hereinafter, although an Example demonstrates this invention more concretely, the technical scope of this invention is not limited to these illustrations.
（カフェイン量の測定方法）
試料溶液をメンブレンフィルター（アドバンテック（株）製ＤＩＳＭＩＣ 親水性ＰＴＦＥ、０.４５μｍ）でろ過して、下記表１に示す高速液体クロマトグラフィー（ＨＰＬＣ）法にてカフェイン量を定量した。ＨＰＬＣ分析条件を下記表１に示した。
The sample solution was filtered with a membrane filter (DISMIC hydrophilic PTFE manufactured by Advantech Co., Ltd., 0.45 μm), and the amount of caffeine was quantified by the high performance liquid chromatography (HPLC) method shown in Table 1 below. The HPLC analysis conditions are shown in Table 1 below.
［試験１］（イオン添加濃度と濁度低減効果）
緑茶葉１００ｇに対して７０℃の熱水３６００ｇを添加し、６分間抽出した。抽出後、固液分離し、得られた濾液を２０℃まで冷却した後にイオン交換水で３６００ｇとし、緑茶抽出液を得た。得られた緑茶抽出液３６０ｇに対し、酸性白土（ミズライト：水澤化学社製）８ｇを０．１ｍＭ〜１Мの塩化カリウム溶液、または塩化カルシウム溶液４０ｇにそれぞれ懸濁させた液を添加後、室温（２５℃）で１０分間接触させた。接触後に遠心分離処理を行い、比較例１および実施例１〜１２の白土処理緑茶抽出液を得た。
[Test 1] (Ion addition concentration and turbidity reduction effect)
3600 g of hot water at 70 ° C. was added to 100 g of green tea leaves and extracted for 6 minutes. After extraction, solid-liquid separation was performed, and the obtained filtrate was cooled to 20 ° C. and then made up to 3600 g with ion-exchanged water to obtain a green tea extract. After adding a solution obtained by suspending 8 g of acid clay (Mizulite: manufactured by Mizusawa Chemical Co., Ltd.) in 0.1 mM to 1 М potassium chloride solution or 40 g of calcium chloride solution to 360 g of the obtained green tea extract, room temperature ( 25 ° C.) for 10 minutes. Centrifugation processing was performed after contact, and the clay-treated green tea extract of Comparative Example 1 and Examples 1 to 12 was obtained.
得られた白土処理緑茶抽出液について、高速液体クロマトグラフィー（ＨＰＬＣ：日本分光社製）を用いてカフェイン量を定量し、分光光度計（日立社製、Ｕ−３３１０）を用いて濁度測定を行った。また、白土処理緑茶抽出液４００ｇを０．２μｍメンブランフィルターで濾過し、得られた濾液にＬ−アスコルビン酸および炭酸水素ナトリウムを添加後、イオン交換水で１０００ｇとして、緑茶飲料を得た。得られた緑茶飲料について、訓練されたパネリスト６名によって香味について官能評価を行った。香味評価は陽イオン無添加区（比較例１）を対照（４点）とし、緑茶飲料としての総合的な香味を５段階評価で相対評価した。評価基準は以下に示したとおりである。陽イオン無添加区に対するカフェイン除去率および比較例１に対する濁度低減率、香味評価結果を下記表２に示した。下記表２中の「処理ｐＨ」は、緑茶抽出物と、白土との接触時のｐＨを表す。 About the obtained clay-treated green tea extract, the amount of caffeine was quantified using high performance liquid chromatography (HPLC: manufactured by JASCO Corporation), and turbidity measurement was performed using a spectrophotometer (manufactured by Hitachi, U-3310). Went. Moreover, 400 g of clay-treated green tea extract was filtered through a 0.2 μm membrane filter, L-ascorbic acid and sodium hydrogen carbonate were added to the obtained filtrate, and then 1000 g was added with ion-exchanged water to obtain a green tea beverage. About the obtained green tea drink, sensory evaluation was performed about the flavor by 6 trained panelists. For the flavor evaluation, the cation-free group (Comparative Example 1) was used as a control (4 points), and the overall flavor as a green tea beverage was relatively evaluated by a five-step evaluation. The evaluation criteria are as shown below. The caffeine removal rate for the cation-free zone, the turbidity reduction rate for Comparative Example 1, and the flavor evaluation results are shown in Table 2 below. “Treatment pH” in Table 2 below represents the pH at the time of contact between the green tea extract and white clay.
官能評価基準
５点：香味が良好になっている
４点：対照（比較例１）と同等である
３点：対照（比較例１）よりわずかに劣っている
２点：対照（比較例１）より明らかに劣っている
１点：対照（比較例１）よりかなり顕著に劣っている
Sensory evaluation criteria 5 points: flavor is good 4 points: equivalent to the control (Comparative Example 1) 3 points: slightly inferior to the control (Comparative Example 1) 2 points: control (Comparative Example 1) 1 point: considerably worse than the control (Comparative Example 1)
評価点はさらに以下の評価基準でレベル分けした。◎が比較例１の緑茶飲料（陽イオン無添加区）の香味に最も近く、○、△、×の順に従って、比較例１の緑茶飲料（陽イオン無添加区）からの香味の変化が大きくなるものである。
◎：（５段階評価で３．５点以上）
○：（５段階評価で３．０点以上３．５点未満）
△：（５段階評価で２．５点以上３．０点未満）
×：（５段階評価で２．５点未満）
The evaluation points were further classified according to the following evaluation criteria. ◎ is closest to the flavor of the green tea beverage of Comparative Example 1 (with no cation added), and the change in flavor from the green tea beverage of Comparative Example 1 (with no cation added) is large in the order of ○, Δ, ×. It will be.
A: (3.5 points or more in a five-step evaluation)
○: (3.0 points or more and less than 3.5 points in a 5-step evaluation)
Δ: (2.5 points or more and less than 3.0 points in a five-step evaluation)
X: (less than 2.5 points in a 5-step evaluation)
白土処理時に塩化カリウムまたは塩化カルシウムを添加することによって、緑茶飲料中のカフェインが十分除去されるとともに、緑茶飲料中の濁度が低減された。濁度低減は陽イオンの添加濃度が高いほど、その効果が顕著であった。 By adding potassium chloride or calcium chloride during the clay treatment, caffeine in the green tea beverage was sufficiently removed and the turbidity in the green tea beverage was reduced. The effect of turbidity reduction was more pronounced as the concentration of cation added was higher.
［試験２］（陽イオンの違いによる濁度低減効果）
緑茶葉１００ｇに対して７０℃の熱水３６００ｇを添加し、６分間抽出した。抽出後、固液分離し、得られた濾液を２０℃まで冷却した後にイオン交換水で３６００ｇとし、緑茶抽出液を得た。得られた緑茶抽出液３６０ｇに対し、酸性白土（ミズライト：水澤化学社製）８ｇを１０ｍＭの塩化ナトリウム、塩化カリウム、塩化カルシウム、または塩化マグネシウム溶液４０ｇにそれぞれ懸濁させた液を添加後、室温（２５℃）で１０分間接触させた。接触後に遠心分離処理を行い、比較例２および実施例１３〜１６の白土処理緑茶抽出液を得た。
[Test 2] (Turbidity reduction effect by cation difference)
3600 g of hot water at 70 ° C. was added to 100 g of green tea leaves and extracted for 6 minutes. After extraction, solid-liquid separation was performed, and the obtained filtrate was cooled to 20 ° C. and then made up to 3600 g with ion-exchanged water to obtain a green tea extract. After adding a solution obtained by suspending 8 g of acid clay (Mizulite: manufactured by Mizusawa Chemical Co., Ltd.) in 10 mM sodium chloride, potassium chloride, calcium chloride or magnesium chloride solution to 360 g of the obtained green tea extract, It was made to contact for 10 minutes at (25 degreeC). Centrifugation processing was performed after contact, and the clay-treated green tea extract of Comparative Example 2 and Examples 13 to 16 was obtained.
得られた白土処理緑茶抽出液について、高速液体クロマトグラフィー（ＨＰＬＣ：日本分光社製）を用いてカフェイン量を定量し、分光光度計（日立社製、Ｕ−３３１０）を用いて濁度測定を行った。また、白土処理緑茶抽出液４００ｇを０．２μｍメンブランフィルターで濾過し、得られた濾液にＬ−アスコルビン酸および炭酸水素ナトリウムを添加後、イオン交換水で１０００ｇとして、緑茶飲料を得た。得られた緑茶飲料について、上記試験１と同じ評価基準により、香味評価を行った（ただし、対照を比較例２とした）。陽イオン無添加区に対するカフェイン除去率および比較例２に対する濁度低減率を下記表３に示した。下記表３中の処理ｐＨは、緑茶抽出物と、白土との接触時のｐＨを表す。 About the obtained clay-treated green tea extract, the amount of caffeine was quantified using high performance liquid chromatography (HPLC: manufactured by JASCO Corporation), and turbidity measurement was performed using a spectrophotometer (manufactured by Hitachi, U-3310). Went. Moreover, 400 g of clay-treated green tea extract was filtered through a 0.2 μm membrane filter, L-ascorbic acid and sodium hydrogen carbonate were added to the obtained filtrate, and then 1000 g was added with ion-exchanged water to obtain a green tea beverage. The obtained green tea beverage was evaluated for flavor according to the same evaluation criteria as in Test 1 (however, the control was Comparative Example 2). The caffeine removal rate for the cation-free zone and the turbidity reduction rate for Comparative Example 2 are shown in Table 3 below. The treatment pH in Table 3 below represents the pH at the time of contact between the green tea extract and white clay.
白土処理時に塩化ナトリウム、塩化カリウム、塩化カルシウム、または塩化マグネシウムを添加することによって、茶飲料中のカフェインが十分除去されるとともに、茶飲料中の濁度が低減された。特に、１価の陽イオンの中では、カリウムイオンが濁度をより低減できることがわかる。 By adding sodium chloride, potassium chloride, calcium chloride or magnesium chloride during the clay treatment, caffeine in the tea beverage was sufficiently removed and the turbidity in the tea beverage was reduced. In particular, it can be seen that potassium ions can further reduce turbidity among monovalent cations.
［試験３］（カルシウム塩の違いによる濁度低減効果）
緑茶葉１００ｇに対して７０℃の熱水３６００ｇを添加し、６分間抽出した。抽出後、固液分離を行い、得られた濾液を２０℃まで冷却した後にイオン交換水で３６００ｇとし、緑茶抽出液を得た。得られた緑茶抽出液３６０ｇに対し、酸性白土（ミズライト：水澤化学社製）８ｇを１０ｍＭのグルコン酸カルシウム、アスコルビン酸カルシウム、または乳酸カルシウム溶液４０ｇにそれぞれ懸濁させた液を添加後、室温（２５℃）で１０分間接触させた。接触後に遠心分離処理を行い、比較例３および実施例１７〜１９の白土処理緑茶抽出液を得た。
[Test 3] (Turbidity reduction effect due to difference in calcium salt)
3600 g of hot water at 70 ° C. was added to 100 g of green tea leaves and extracted for 6 minutes. After extraction, solid-liquid separation was performed, and the obtained filtrate was cooled to 20 ° C. and then made up to 3600 g with ion-exchanged water to obtain a green tea extract. After adding a solution obtained by suspending 8 g of acid clay (Mizulite: manufactured by Mizusawa Chemical Co., Ltd.) in 10 mM of calcium gluconate, calcium ascorbate or calcium lactate solution to 360 g of the obtained green tea extract, room temperature ( 25 ° C.) for 10 minutes. Centrifugation processing was performed after contact, and the clay-treated green tea extract of Comparative Example 3 and Examples 17 to 19 was obtained.
得られた白土処理緑茶抽出液について、高速液体クロマトグラフィー（ＨＰＬＣ：日本分光社製）を用いてカフェイン量を定量し、分光光度計（日立社製、Ｕ−３３１０）を用いて濁度測定を行った。また、白土処理緑茶抽出液４００ｇを０．２μｍメンブランフィルターで濾過し、得られた濾液にＬ−アスコルビン酸および炭酸水素ナトリウムを添加後、イオン交換水で１０００ｇとして、緑茶飲料を得た。得られた緑茶飲料について、上記試験１と同じ評価基準により、香味評価を行った（ただし、対照を比較例３とした）。陽イオン無添加区に対するカフェイン除去率および比較例３に対する濁度低減率を表４に示した。下記表４中の処理ｐＨは、緑茶抽出物と、白土との接触時のｐＨを表す。 About the obtained clay-treated green tea extract, the amount of caffeine was quantified using high performance liquid chromatography (HPLC: manufactured by JASCO Corporation), and turbidity measurement was performed using a spectrophotometer (manufactured by Hitachi, U-3310). Went. Moreover, 400 g of clay-treated green tea extract was filtered through a 0.2 μm membrane filter, L-ascorbic acid and sodium hydrogen carbonate were added to the obtained filtrate, and then 1000 g was added with ion-exchanged water to obtain a green tea beverage. The obtained green tea beverage was evaluated for flavor according to the same evaluation criteria as in Test 1 above (however, the control was Comparative Example 3). Table 4 shows the caffeine removal rate for the cation-free group and the turbidity reduction rate for Comparative Example 3. The treatment pH in Table 4 below represents the pH at the time of contact between the green tea extract and white clay.
いずれのカルシウム塩においても、白土処理時に添加することによって、茶飲料中のカフェインが十分除去されるとともに、濁度が低減された。 In any calcium salt, caffeine in the tea beverage was sufficiently removed and turbidity was reduced by adding it during the clay treatment.
［試験４］（白土違いにおける、塩化カルシウム添加による濁度低減効果）
緑茶葉１００ｇに対して７０℃の熱水３６００ｇを添加し、６分間抽出した。抽出後、固液分離し、得られた濾液を２０℃まで冷却した後にイオン交換水で３６００ｇとし、緑茶抽出液を得た。得られた緑茶抽出液３６０ｇに対し、酸性白土（ミズカエース＃２０、ミズカエース＃４００：水澤化学社製、Ｃｌａｒｉｔ１００Ｇ、Ｔｏｎｓｉｌ５３１Ｎ：ズードケミー触媒社製）、または活性白土（ガレオンアースＶ２：水澤化学社製）８ｇを１０ｍＭの塩化カルシウム溶液４０ｇにそれぞれ懸濁させた液を添加後、室温（２５℃）で１０分間接触させた。接触後に遠心分離処理を行い、比較例４〜８および実施例２０〜２４の白土処理緑茶抽出液を得た。
[Test 4] (Turbidity reduction effect by adding calcium chloride in different white clay)
3600 g of hot water at 70 ° C. was added to 100 g of green tea leaves and extracted for 6 minutes. After extraction, solid-liquid separation was performed, and the obtained filtrate was cooled to 20 ° C. and then made up to 3600 g with ion-exchanged water to obtain a green tea extract. For 360 g of the obtained green tea extract, 8 g of acidic clay (Mizuka Ace # 20, Mizuka Ace # 400: manufactured by Mizusawa Chemical Co., Ltd., Clarit 100G, Tonsil 531N: manufactured by Zude Chemie Catalysts Co., Ltd.) or activated clay (Galleon Earth V2: manufactured by Mizusawa Chemical Co., Ltd.) Each solution was suspended in 40 g of 10 mM calcium chloride solution and then contacted at room temperature (25 ° C.) for 10 minutes. Centrifugation processing was performed after contact, and the clay-treated green tea extracts of Comparative Examples 4 to 8 and Examples 20 to 24 were obtained.
得られた白土処理緑茶抽出液について、高速液体クロマトグラフィー（ＨＰＬＣ：日本分光社製）を用いてカフェイン量を定量し、分光光度計（日立社製、Ｕ−３３１０）を用いて濁度測定を行った。また、白土処理緑茶抽出液４００ｇを０．２μｍメンブランフィルターで濾過し、得られた濾液にＬ−アスコルビン酸および炭酸水素ナトリウムを添加後、イオン交換水で１０００ｇとして、緑茶飲料を得た。得られた緑茶飲料について、上記試験１と同じ評価基準により、香味評価を行った（ただし、実施例２０、２１、２２、２３、および２４に対する対照を、それぞれ比較例４、５、６、７、および８とした）。それぞれの使用白土の陽イオン無添加区に対するカフェイン除去率およびイオン無添加の比較例に対する濁度低減率を下記表５に示した。下記表５中の処理ｐＨは、緑茶抽出物と、白土との接触時のｐＨを表す。 About the obtained clay-treated green tea extract, the amount of caffeine was quantified using high performance liquid chromatography (HPLC: manufactured by JASCO Corporation), and turbidity measurement was performed using a spectrophotometer (manufactured by Hitachi, U-3310). Went. Moreover, 400 g of clay-treated green tea extract was filtered through a 0.2 μm membrane filter, L-ascorbic acid and sodium hydrogen carbonate were added to the obtained filtrate, and then 1000 g was added with ion-exchanged water to obtain a green tea beverage. The obtained green tea beverage was evaluated for flavor according to the same evaluation criteria as in Test 1 above (however, the controls for Examples 20, 21, 22, 23, and 24 were compared with Comparative Examples 4, 5, 6, and 7, respectively). , And 8). Table 5 below shows the caffeine removal rate for the cation-free zone of each used clay and the turbidity reduction rate for the comparative example with no ion added. The treatment pH in Table 5 below represents the pH at the time of contact between the green tea extract and white clay.
いずれの白土においても、白土処理時に塩化カルシウムを添加することによって、茶飲料中のカフェインが十分除去されるとともに、濁度が低減された。 In any white clay, caffeine in the tea beverage was sufficiently removed and turbidity was reduced by adding calcium chloride during the white clay treatment.
［試験５］（烏龍茶における、塩化カルシウム添加による濁度低減効果）
烏龍茶葉１００ｇに対して８０℃の熱水３６００ｇを添加し、５分間抽出した。抽出後、固液分離し、得られた濾液を２０℃まで冷却した後にイオン交換水で３６００ｇとし、烏龍茶抽出液を得た。得られた烏龍茶抽出液３６０ｇに対し、酸性白土（ミズライト：水澤化学社製）８ｇを１０ｍＭの塩化カルシウム溶液４０ｇに懸濁させた液を添加後、室温（２５℃）で１０分間接触させた。接触後に遠心分離処理を行い、比較例９および実施例２５の白土処理烏龍茶抽出液を得た。
[Test 5] (turbidity reduction effect by adding calcium chloride in oolong tea)
3100 g of hot water at 80 ° C. was added to 100 g of oolong tea leaves, and extracted for 5 minutes. After extraction, it was separated into solid and liquid, and the obtained filtrate was cooled to 20 ° C. and then made up to 3600 g with ion-exchanged water to obtain Oolong tea extract. A solution obtained by suspending 8 g of acid clay (Mizulite: manufactured by Mizusawa Chemical Co., Ltd.) in 40 g of 10 mM calcium chloride solution was added to 360 g of the obtained Oolong tea extract, and then contacted at room temperature (25 ° C.) for 10 minutes. Centrifugation processing was performed after contact, and the clay-treated oolong tea extract of Comparative Example 9 and Example 25 was obtained.
得られた白土処理烏龍茶抽出液について、高速液体クロマトグラフィー（ＨＰＬＣ：日本分光社製）を用いてカフェイン量を定量し、分光光度計（日立社製、Ｕ−３３１０）を用いて濁度測定を行った。また、白土処理烏龍茶抽出液３２０ｇを０．２μｍメンブランフィルターで濾過し、得られた濾液にＬ−アスコルビン酸および炭酸水素ナトリウムを添加後、イオン交換水で１０００ｇとして、烏龍茶飲料を得た。得られた烏龍茶飲料について、上記試験１と同じ評価基準により、香味評価を行った（ただし、対照を比較例９とした）。陽イオン無添加区に対するカフェイン除去率および比較例９に対する濁度低減率および香味の評価結果を下記表６に示した。下記表６中の処理ｐＨは、烏龍茶抽出物と、白土との接触時のｐＨを表す。 About the obtained clay-treated oolong tea extract, the amount of caffeine was quantified using high performance liquid chromatography (HPLC: manufactured by JASCO Corporation), and turbidity measurement was performed using a spectrophotometer (Hitachi, U-3310). Went. Further, 320 g of the clay-treated oolong tea extract was filtered through a 0.2 μm membrane filter, and L-ascorbic acid and sodium hydrogen carbonate were added to the obtained filtrate, and then 1000 g was added with ion-exchanged water to obtain a oolong tea beverage. The obtained oolong tea beverage was evaluated for flavor according to the same evaluation criteria as in Test 1 above (however, the control was Comparative Example 9). Table 6 below shows the caffeine removal rate with respect to the cation-free zone and the evaluation results of the turbidity reduction rate and flavor with respect to Comparative Example 9. The treatment pH in Table 6 below represents the pH at the time of contact between oolong tea extract and white clay.
烏龍茶においても、白土処理時に塩化カルシウムを添加することによって、茶飲料中のカフェインが十分除去されるとともに、濁度が低減された。 Also in Oolong tea, by adding calcium chloride during the clay treatment, caffeine in the tea beverage was sufficiently removed and the turbidity was reduced.
［試験６］（紅茶における、カルシウム添加による濁度低減効果）
紅茶葉１００ｇに対して８０℃の熱水３６００ｇを添加し、５分間抽出した。抽出後、固液分離し、得られた濾液を２０℃まで冷却した後にイオン交換水で３６００ｇとし、紅茶抽出液を得た。得られた紅茶抽出液３６０ｇに対し、酸性白土（ミズライト：水澤化学社製）８ｇを１０ｍＭの塩化カルシウム溶液４０ｇに懸濁させた液を添加後、室温（２５℃）で１０分間接触させた。接触後に遠心分離処理を行い、比較例１０および実施例２６の白土処理紅茶抽出液を得た。
[Test 6] (Turbidity reduction effect by calcium addition in black tea)
3600 g of hot water at 80 ° C. was added to 100 g of black tea leaf, and extracted for 5 minutes. After extraction, solid-liquid separation was performed, and the obtained filtrate was cooled to 20 ° C. and then made up to 3600 g with ion-exchanged water to obtain a black tea extract. A solution obtained by suspending 8 g of acid clay (Mizulite: manufactured by Mizusawa Chemical Co., Ltd.) in 40 g of 10 mM calcium chloride solution was added to 360 g of the obtained black tea extract, and then contacted at room temperature (25 ° C.) for 10 minutes. Centrifugation treatment was performed after contact, and the clay-treated black tea extract of Comparative Example 10 and Example 26 was obtained.
得られた白土処理紅茶抽出液について、高速液体クロマトグラフィー（ＨＰＬＣ：日本分光社製）を用いてカフェイン量を定量し、分光光度計（日立社製、Ｕ−３３１０）を用いて濁度測定を行った。また、白土処理紅茶抽出液３２０ｇを０．２μｍメンブランフィルターで濾過し、得られた濾液にＬ−アスコルビン酸および炭酸水素ナトリウムを添加後、イオン交換水で１０００ｇとして、紅茶飲料を得た。得られた紅茶飲料について、上記試験１と同じ評価基準により、香味評価を行った（ただし、対照を比較例１０とした）。
陽イオン無添加区に対するカフェイン除去率および比較例１０に対する濁度低減率および香味の評価結果を下記表７に示した。下記表７中の処理ｐＨは、紅茶抽出物と、白土との接触時のｐＨを表す。
About the obtained clay-treated black tea extract, the amount of caffeine was quantified using high performance liquid chromatography (HPLC: manufactured by JASCO Corporation), and turbidity measurement was performed using a spectrophotometer (manufactured by Hitachi, U-3310). Went. In addition, 320 g of the clay-treated black tea extract was filtered through a 0.2 μm membrane filter, and L-ascorbic acid and sodium hydrogen carbonate were added to the obtained filtrate, and then 1000 g was added with ion-exchanged water to obtain a tea beverage. The obtained black tea beverage was evaluated for flavor according to the same evaluation criteria as in Test 1 above (however, the control was Comparative Example 10).
Table 7 below shows the caffeine removal rate with respect to the cation-free zone, the turbidity reduction rate with respect to Comparative Example 10, and the flavor evaluation results. The treatment pH in Table 7 below represents the pH at the time of contact between the black tea extract and white clay.
紅茶においても、白土処理時に塩化カルシウムを添加することによって、茶飲料中のカフェインが十分除去されるとともに、濁度が低減された。 Also in black tea, by adding calcium chloride during the clay treatment, caffeine in the tea beverage was sufficiently removed and the turbidity was reduced.
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