JP2004049201A - Method for producing pigment-containing dry material and mixture with instant tea prepared by using the same - Google Patents

Method for producing pigment-containing dry material and mixture with instant tea prepared by using the same Download PDF

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Publication number
JP2004049201A
JP2004049201A JP2002242666A JP2002242666A JP2004049201A JP 2004049201 A JP2004049201 A JP 2004049201A JP 2002242666 A JP2002242666 A JP 2002242666A JP 2002242666 A JP2002242666 A JP 2002242666A JP 2004049201 A JP2004049201 A JP 2004049201A
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Japan
Prior art keywords
pigment
dye
cyclodextrin
dried product
containing dried
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JP2002242666A
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Japanese (ja)
Inventor
Yasuji Takahama
高浜 保司
Hitoshi Hirai
平井 整
Akihito Kawade
川出 明史
Hiroyasu Sugiyama
杉山 浩康
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Sato Foods Industries Co Ltd
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Sato Foods Industries Co Ltd
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Priority to JP2002242666A priority Critical patent/JP2004049201A/en
Publication of JP2004049201A publication Critical patent/JP2004049201A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a pigment-containing dry material containing the pigment extracted from a green colored plant such as a tea tree, and exhibiting almost no flavor deterioration in such as a color tone, an aroma, etc., even by preserving under exposure to light for a long period. <P>SOLUTION: This method for producing the pigment-containing dry material is provided by performing a solvent extraction of the pigment from the green colored plant such as the tea tree by using a 50-100 (W/W) % aqueous organic solvent and preferably drying by using a cyclodextrin as a powdering base material. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、茶類などの緑色植物から抽出した色素の色調や香りなどの風味が、露光下で長期保存してもほとんど劣化しない色素含有乾燥物の製造方法に関するものである。
【0002】
【従来の技術】
加工食品の分野では、例えば、ゼリー、アイスクリームなどの洋菓子、ようかん、饅頭などの和菓子などを緑色に色づけする目的で、抹茶を添加するなどが行われている。しかし、抹茶などの緑色植物加工品は紫外線、熱に対して不安定で、色調や香りなどの風味が劣化しやすいという問題がある。
【0003】
これらの問題に対し、緑色植物の緑色を保持するため、例えば抹茶にサイクロデキストリンを加えて混練後に噴霧乾燥する方法(特公平07−046969号公報)、緑色植物を圧搾して得られる青汁を、炭酸ソーダなどでpHを6〜9に調整した後に噴霧乾燥する方法(特公昭46−38548号公報)、茶葉から水抽出した色素にグルコースを添加して複合化反応により色素を安定化させる方法(福岡県工業技術センター研究報告、7、1〜4、1995)などが提唱されている。しかし、紫外線や熱に対する色調の安定性は満足できるものではなく、さらに抹茶などを添加すると食感がざらついたり、或いは飲料などへ分散使用した際には、濁りを生じるため、商品価値を低下させることもある。
【0004】
【発明が解決しようとする課題】
本発明では、茶類などの緑色植物から抽出した色素より、露光下で長期保存しても色調や香りなどの風味劣化がほとんどない色素含有乾燥物を得ることを目的としたものである。
【0005】
【課題を解決するための手段】
本発明者らは、上記課題を解決するために鋭意研究の結果、緑色植物から色素を溶剤抽出し、粉末化基材存在下で乾燥することにより、露光下で長期保存しても色調や香りなどの風味劣化がほとんどない色素含有乾燥物が得られることを見出し、本発明に到達した。
【0006】
すなわち、本発明は、緑色植物から色素を溶剤抽出し、粉末化基材存在下で乾燥することを要旨とするものである。
【0007】
【発明の実施の形態】
次に、本発明を詳しく説明する。本発明の色素含有乾燥物は、色素抽出工程、粉末化基材混合工程及び乾燥工程により製造できる。
【0008】
色素抽出工程とは、緑色植物に有機溶剤を加えて色素を抽出する工程である。しかし、周知の方法により圧搾して得られる搾汁液に有機溶剤を加えて色素を抽出してもよい。この際使用する緑色植物は、クロロフィルなどの緑色色素を有する植物であればいかなるものでも使用することができるが、例えば、煎茶、玉露、かぶせ茶、碾茶、抹茶などの茶類(生葉、荒茶、仕上げ茶などを含む)、ほうれん草、小松菜、春菊、大麦若葉、などの青菜類、青じそ、パセリ、セロリなどの香味野菜類、或いは大麦若葉、ケール、キャベツ、大根やかぶらの葉などのその他の野菜類などがあげられる。その他、果実類の葉や牧草などでも構わない。これらは単独で使用してもよいが、2種以上の混合物として用いてもよい。抽出効率を上げるためには、そのまま或いは乾燥後に石臼、ボールミルなどの常法に従って粉砕して使用する方が好ましい。また、セルラーゼ、ペクチナーゼ、アミラーゼ、リパーゼ或いはプロテアーゼなどの酵素で処理してから色素抽出を行うこともできる。
【0009】
色素抽出に使用する有機溶剤は、緑色色素を溶解できるものであれば、いずれでもよく、エタノール、メタノールなどのアルコール類、ジエチルエーテル、ジメチルエーテルなどのエーテル類、石油エーテル、ヘキサンなどの炭化水素類、酢酸エチルなどのエステル類、アセトンなどのケトン類、その他、アセトニトリル、四塩化炭素、ジクロロメタン、クロロホルム、ベンゼンなどが例示できる。これらは単独で使用してもよいが、2種以上の混合液として、或いはそれらの水溶液或いは水分散液として使用することもできる。この際使用できる水は、単なる水道水、脱イオン水、蒸留水、脱酸素水などを例示できるが、色素の変質を低減できる脱酸素水が好ましい。また、粉末化基材による色素の被服効果を上げるためには、アルコール類、アセトンなどの親水性有機溶剤を使用する方がよく、食品として使用する場合には、人体への安全性が高いエタノールを使用する方が、より好ましい。親水性有機溶剤は、特に限定するのもではないが、50〜100(W/W)%の水溶液が好ましく、さらに80〜100(W/W)%の範囲で使用する方がより好ましい。この範囲よりも濃度が低くなると、色素の抽出効率が劣り、色調が悪くなりやすい。また、この水溶液中にアスコルビン酸、ビタミンEなどの抗酸化剤類、乳化剤類を、適宜添加したものでもよい。抽出温度は、特に限定するものではないが、0℃以上50℃以下が好ましい。抽出温度が0℃未満では抽出効率が低下し、また、50℃を越えた温度では、抽出中に色素が変色するなどの問題を生じやすくなる。抽出時間は、使用する緑色植物によって適宜調整すればよいが、通常1から60分程度でよく、これ以上抽出時間を長くしても、抽出効率が変わらない場合が多い。緑色植物1重量部を有機溶剤(水溶液或いは水分散液でも可)2から30重量部程度で浸漬あるいは、攪拌しながら抽出を行い、さらに、抽出後は粗分離により、色素抽出液を得ることができる。回分抽出により色素の力価を上げてもよい。色素抽出液は、必要に応じてフィルターなどを用いた濾過或いは遠心分離機などにより清澄化を行う。なお、粕分離後の粕中には、例えば茶類であればアミノ酸、カテキン、カフェインなどの水溶性成分が残存しているため、例えば水を加えて加温抽出すれば、これらの有効成分を再抽出できるなどの有効利用も可能である。
【0010】
粉末化基材混合工程は、色素抽出工程で得られた色素抽出液に、粉末化基材と粉末化基材溶解用の水を適宜混合溶解し、乾燥工程に供するための原液を調整するための工程である。この際使用できる水は、単なる水道水、脱イオン水、蒸留水、脱酸素水などを例示できるが、色素の変質を低減できる脱酸素水が好ましく、また、アスコルビン酸、ビタミンEなどの抗酸化剤類、乳化剤類を、適宜添加したものでもよい。本発明では、デキストリン、乳糖、オリゴ糖類、可溶性澱粉、トレハロースなどの周知の粉末化基材を使用することができる。粉末化基材の量は、特に限定するものではないが、粉末化基材の固形分重量として、色素抽出液1重量部に対して0.05から10重量部を使用すればよい。さらにサイクロデキストリンを粉末化基材に用いれば、色素含有乾燥物の色調や保存性、水溶解時の清澄性を改善できるため、より好ましい。また、サイクロデキストリンは粉末化基材混合工程だけでなく、上記した色素抽出工程の抽出時から使用してもよい。
【0011】
使用できるサイクロデキストリンは、グルコース単位が6個から8個より成る環状構造を有するものであればいずれでもよく(グルコース単位が6個のものをα−サイクロデキストリン、7個のものをβ−サイクロデキストリン、8個のものをγ−サイクロデキストリンという。)、例えば、非分岐サイクロデキストリン、分岐サイクロデキストリン(グルコシルサイクロデキストリン、マルトシルサイクロデキストリンなど)、サイクロデキストリン誘導体(ジメチルサイクロデキストリン、トリメチルサイクロデキストリン、ヒドロキシエチルサイクロデキストリン、ヒドロキシプロピルサイクロデキストリンなど)などでもよい。サイクロデキストリンを使用するにあたっては、上記に例示したようなサイクロデキストリンや、α、β、γ−サイクロデキストリンの混合物として市販されている、例えば商品名デキシーパールK−50(塩水港精糖(株)製)や、商品名リングデックス−PK(メルシャン(株)製)といったものを単独で、或いはこれらを混合して用いればよい。
【0012】
乾燥工程に供する原液は、特に限定するものではないが、固形分濃度が5から50%の範囲が好ましい。この範囲よりも固形分濃度が低いと、乾燥時間が長くなるなど乾燥経費が高くなりやすく、逆に固形分濃度が高い場合は、原液粘度が高くなるなどの理由で、乾燥しづらくなる。固形分濃度が低い場合は、乾燥工程の前に濃縮操作を行っても構わない。濃縮手段は、減圧濃縮、凍結濃縮、逆浸透圧膜濃縮などの周知の方法を使用することができるが、抽出工程で使用した有機溶剤の除去にも好適な減圧濃縮が好ましい。色素含有乾燥物中に有機溶剤が残存した場合、風味が悪くなるばかりか、保存性も悪くなりやすくなるため、この段階で、乾燥工程後に有機溶剤が残存しない程度まで、有機溶剤を除去することがより好ましい。また、乾燥工程に供する原液に、茶類エキスを添加混合し、乾燥後にインスタント茶類として使用することもできる。
【0013】
乾燥工程は、真空乾燥、噴霧乾燥、凍結乾燥などの周知の方法により粉末化基材混合液を乾燥して、色素含有乾燥物を得る工程である。色素の変色をできるだけ少なくするには、噴霧乾燥、凍結乾燥が好適であるが、いずれの場合も、色素含有乾燥物中の有機溶剤濃度が、2(W/W)%以下であることが好ましい。この濃度よりも残存する有機溶媒濃度が高い場合は、上記したような有機溶剤による異臭や保存中の退色を生じやすくなる。また、色素含有乾燥物は、そのまま使用してもよいが、周知の方法により顆粒状、ブロック状、タブレット状に成形加工して使用することもできる。
【0014】
以上のような工程により、茶類などの緑色植物から抽出した色素から、露光下で長期保存しても色調や香りなどの風味劣化がほとんどない色素含有乾燥物を得ることができる。これらの色素含有乾燥物は、粉砕茶からなるインスタント茶類或いは茶類から抽出したエキスを乾燥粉末化したインスタント茶類などと適宜混合して使用すれば、それらの色調を改善することができる。
【0015】
【実施例】
次に、試験例、実施例によって本発明を具体的に説明する。
【0016】
(試験例1)
抹茶1kgを、表1に記載のエタノール水溶液(5kg)に添加して、20℃で10分間浸漬した後に、粕分離とフィルター濾過により、各々の色素抽出液(約3.5kgづつ)を得た。それらの色素抽出液に、表1に記載の粉末化基材(2kg)を添加混合し、脱酸素水にて固形分濃度が5(W/W)%になるように混合溶解した後に、チャンバー温度90℃の条件にて噴霧乾燥し、色素含有乾燥物のサンプルA〜Nを各々、約1.9kgづつ得た。また、得られた色素含有乾燥物A〜N中の残留エタノール濃度は、いずれも1(W/W)%未満であった。
【0017】
【表1】

Figure 2004049201
【0018】
これらの色素含有乾燥物と原料に使用した抹茶を、ポリプロピレン性の透明袋に入れ、露光下、常温で1ヶ月間保存し、その間の色調の経時変化を目視検査により調べた。その結果原料抹茶は真っ白に退色したが、表2のとおり、色素含有乾燥物A〜Nの露光下での保存性は良好であり、特に、色素抽出時に使用したエタノール水溶液の濃度が50〜100(W/W)%の場合は良好であった。また、粉末化基材にサイクロデキストリンを使用したH〜Nは、サイクロデキストリンを使用していないA〜Gよりも、結果が良好であった。また、保存テスト終了後に、色素含有乾燥物A〜Nをそれぞれ0.5gづつ採取して冷水150mlに溶解させたところ、いずれの香りにも変質臭は認められず、風味的にも良好であった。
【0019】
【表2】
Figure 2004049201
【0020】
(実施例1)
抹茶1kgを、95%のエタノール水溶液(4kg)に添加し、25℃で5分間の撹拌抽出を行った。圧搾後に、遠心分離により清澄化して3.3kgの色素抽出液を得た。この色素抽出液に、サイクロデキストリンを含有するデキストリン製剤である商品名セルデックスSL−20(日本食品加工(株)製)を5kg添加し、蒸留水によって固形分濃度が10(W/W)%になるように混合溶解した後に、チャンバー温度95℃の条件にて噴霧乾燥を行い、色素含有乾燥物Pを3.5kg得た。
【0021】
色素含有乾燥物Pを、市販のインスタント緑茶(真茶撰煎茶上撰(佐藤食品工業(株)製)の顆粒品に5(W/W)%になるように添加し、お湯を注いで風味をみたところ、鮮やかな緑色を呈し、水色の改善が可能であった。
【0022】
(実施例2)
サイクロデキストリンを含むデキストリン製剤(商品名デキシーパールK−50(塩水港精糖(株)製)0.8kgとβ−サイクロデキストリン(日本食品化工(株)製、商品名セルデックスB−100)80gを80℃の温水12kgに溶解した。この液に、緑茶葉1kgを加え、攪拌しながら70℃で10分間抽出し、粕分離して、固形分8(W/W)%の抽出液11kgを得た。この抽出液を遠心分離機で清澄化後、25℃に加温し、逆浸透圧膜濃縮により、固形分12(W/W)%の濃縮液を7kg得た。この濃縮液に、実施例1で得た色素抽出液を0.7kg添加混合し、その後、−40℃に予備凍結後、真空度1Torr、棚加熱温度30℃の条件で凍結真空乾燥し、インスタント緑茶を0.8kg得た。
【0023】
このインスタント緑茶を1g/120mlの条件にて熱湯に溶解後、風味をみたところ、清澄で高級感のある緑色を帯びた水色を示した。また、このインスタント緑茶を、試験例1に準じて露光下で室温1ヶ月間保存したが、色調や風味はほとんど変化しておらず、良好な保存安定性を有していた。
【0024】
【発明の効果】
本発明を用いれば、茶類などの緑色植物から抽出した色素より、露光下で長期保存しても色調や香りなどの風味劣化がほとんどない色素含有乾燥物を得ることができる。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for producing a dye-containing dried product in which the color tone and aroma of a dye extracted from green plants such as teas hardly deteriorate even when stored for a long time under exposure.
[0002]
[Prior art]
In the field of processed foods, for example, matcha is added in order to color green confectionery such as jelly and ice cream, and Japanese confectionery such as yokan and bun. However, processed green plant products such as matcha have a problem in that they are unstable to ultraviolet rays and heat and tend to deteriorate in flavor such as color tone and aroma.
[0003]
In order to keep the green color of the green plant, for example, a method of adding cyclodextrin to matcha, kneading the mixture, and spray-drying the mixture (Japanese Patent Publication No. 07-046969), squeezes the green juice obtained by pressing the green plant. A method of adjusting the pH to 6 to 9 with sodium carbonate or the like, followed by spray drying (Japanese Patent Publication No. 46-54848), a method of adding glucose to a water-extracted dye from tea leaves and stabilizing the dye by a complexing reaction (Fukuoka Industrial Technology Center Research Report, 7, 1-4, 1995). However, the stability of the color tone with respect to ultraviolet light and heat is not satisfactory, and the texture may be rough when powdered green tea or the like is further added, or when used in a beverage or the like, may cause turbidity, thereby lowering the commercial value. Sometimes.
[0004]
[Problems to be solved by the invention]
It is an object of the present invention to obtain a pigment-containing dried product that hardly deteriorates in flavor such as color tone and aroma even after long-term storage under exposure from pigments extracted from green plants such as teas.
[0005]
[Means for Solving the Problems]
The present inventors have conducted intensive studies to solve the above-described problems, and as a result of solvent extraction of a pigment from a green plant and drying in the presence of a powdered substrate, the color tone and fragrance even after long-term storage under exposure. The present inventors have found that a pigment-containing dried product having almost no deterioration in flavor can be obtained, and arrived at the present invention.
[0006]
That is, the gist of the present invention is to extract a pigment from a green plant with a solvent and to dry it in the presence of a powdered substrate.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, the present invention will be described in detail. The pigment-containing dried product of the present invention can be produced by a pigment extraction step, a powdered substrate mixing step, and a drying step.
[0008]
The pigment extraction step is a step of extracting a pigment by adding an organic solvent to a green plant. However, the pigment may be extracted by adding an organic solvent to the squeezed liquid obtained by squeezing according to a known method. As the green plant used at this time, any plant can be used as long as it has a green pigment such as chlorophyll. For example, teas such as sencha, gyokuro, kabusecha, tencha, matcha (fresh leaves, crude tea) , Including finished tea, etc.), green vegetables such as spinach, komatsuna, spring chrysanthemum, barley young leaves, etc .; Examples include vegetables. In addition, leaves or pasture of fruits may be used. These may be used alone or as a mixture of two or more. In order to increase the extraction efficiency, it is preferable to use the powder as it is or after drying, according to a conventional method such as a stone mill or a ball mill. Alternatively, the pigment may be extracted after treatment with an enzyme such as cellulase, pectinase, amylase, lipase or protease.
[0009]
The organic solvent used for the pigment extraction may be any one that can dissolve the green pigment, and may be any of alcohols such as ethanol and methanol, ethers such as diethyl ether and dimethyl ether, petroleum ethers, hydrocarbons such as hexane, and the like. Examples include esters such as ethyl acetate, ketones such as acetone, acetonitrile, carbon tetrachloride, dichloromethane, chloroform, benzene, and the like. These may be used alone, but may also be used as a mixture of two or more, or as an aqueous solution or aqueous dispersion thereof. Examples of water that can be used at this time include simple tap water, deionized water, distilled water, deoxygenated water, and the like, and deoxygenated water that can reduce the deterioration of the dye is preferable. In addition, in order to enhance the effect of coating the pigment with the powdered base material, it is better to use a hydrophilic organic solvent such as alcohols and acetone, and when using as a food, ethanol having high safety to the human body is preferred. It is more preferable to use The hydrophilic organic solvent is not particularly limited, but is preferably an aqueous solution of 50 to 100 (W / W)%, and more preferably used in a range of 80 to 100 (W / W)%. If the concentration is lower than this range, the extraction efficiency of the dye is inferior, and the color tone tends to deteriorate. Further, antioxidants such as ascorbic acid and vitamin E and emulsifiers may be appropriately added to this aqueous solution. The extraction temperature is not particularly limited, but is preferably from 0 ° C to 50 ° C. If the extraction temperature is lower than 0 ° C., the extraction efficiency decreases, and if the temperature exceeds 50 ° C., problems such as discoloration of the dye during the extraction are liable to occur. The extraction time may be appropriately adjusted depending on the green plant to be used, but is usually about 1 to 60 minutes. Even if the extraction time is further increased, the extraction efficiency often does not change. One part by weight of the green plant is immersed in about 2 to 30 parts by weight of an organic solvent (aqueous solution or aqueous dispersion may be used) or extracted with stirring, and after extraction, a pigment extract may be obtained by coarse separation. it can. The dye titer may be increased by batch extraction. The dye extract is clarified by filtration using a filter or the like or a centrifuge if necessary. In addition, since the water-soluble components such as amino acids, catechin, and caffeine remain in the lees after the lees separation, for example, in the case of tea, these active components can be obtained by adding water and extracting with heating. Can also be used effectively, such as re-extraction.
[0010]
The powdered base material mixing step is to appropriately mix and dissolve the powdered base material and water for dissolving the powdered base material in the dye extract obtained in the dye extraction step, and to prepare a stock solution for use in the drying step. It is a process of. Examples of water that can be used at this time include simple tap water, deionized water, distilled water, deoxygenated water, etc., but deoxygenated water that can reduce the deterioration of the pigment is preferable, and antioxidants such as ascorbic acid and vitamin E are also used. Agents and emulsifiers may be appropriately added. In the present invention, well-known powdered base materials such as dextrin, lactose, oligosaccharides, soluble starch, and trehalose can be used. The amount of the powdered substrate is not particularly limited, but the solid content of the powdered substrate may be 0.05 to 10 parts by weight based on 1 part by weight of the dye extract. Furthermore, it is more preferable to use cyclodextrin as a powdered base material because the color tone, storage stability, and clarity during dissolution in water can be improved. Cyclodextrin may be used not only in the powdered substrate mixing step but also in the above-mentioned pigment extraction step.
[0011]
Any cyclodextrin that can be used may be any as long as it has a cyclic structure composed of 6 to 8 glucose units (α-cyclodextrin for 6 glucose units and β-cyclodextrin for 7 glucose units). , Eight of which are referred to as γ-cyclodextrins), for example, unbranched cyclodextrin, branched cyclodextrin (glucosyl cyclodextrin, maltosyl cyclodextrin, etc.), cyclodextrin derivatives (dimethyl cyclodextrin, trimethyl cyclodextrin, hydroxyethyl) Cyclodextrin, hydroxypropyl cyclodextrin, etc.). When cyclodextrin is used, it is commercially available as a cyclodextrin as exemplified above or a mixture of α, β, γ-cyclodextrin, for example, trade name: Dexy Pearl K-50 (manufactured by Shiosui Minato Sugar Co., Ltd.) ) Or Ringdex-PK (trade name, manufactured by Mercian Corporation) may be used alone or in combination.
[0012]
The stock solution to be subjected to the drying step is not particularly limited, but preferably has a solid concentration of 5 to 50%. If the solid content is lower than this range, the drying cost tends to be high, such as a long drying time. Conversely, if the solid content is high, it becomes difficult to dry because the stock solution viscosity becomes high. When the solid content concentration is low, a concentration operation may be performed before the drying step. Well-known methods such as vacuum concentration, freeze concentration and reverse osmosis membrane concentration can be used as the concentration means, but vacuum concentration suitable for removing the organic solvent used in the extraction step is preferable. If the organic solvent remains in the dye-containing dried product, not only does the flavor deteriorate, but also the storage stability tends to deteriorate, so at this stage, the organic solvent should be removed to the extent that the organic solvent does not remain after the drying step. Is more preferred. Alternatively, a tea extract may be added to and mixed with the stock solution to be subjected to the drying step, and dried to be used as instant teas.
[0013]
The drying step is a step of drying the powdered base material mixture by a well-known method such as vacuum drying, spray drying, and freeze drying to obtain a pigment-containing dried product. In order to minimize the discoloration of the dye, spray drying and freeze drying are suitable. In any case, the concentration of the organic solvent in the dried dye-containing product is preferably 2 (W / W)% or less. . If the concentration of the remaining organic solvent is higher than this concentration, an unpleasant odor and discoloration during storage easily occur due to the organic solvent as described above. The pigment-containing dried product may be used as it is, or may be used after being formed into granules, blocks, or tablets by a known method.
[0014]
Through the above steps, a pigment-containing dried product that has almost no deterioration in flavor such as color tone and aroma even after long-term storage under exposure can be obtained from pigments extracted from green plants such as tea. The color tone of these pigment-containing dried products can be improved by appropriately mixing instant teas made of ground tea or extracts extracted from teas with dry powdered instant teas.
[0015]
【Example】
Next, the present invention will be described specifically with reference to Test Examples and Examples.
[0016]
(Test Example 1)
1 kg of matcha was added to an aqueous ethanol solution (5 kg) shown in Table 1, and after immersion at 20 ° C. for 10 minutes, each pigment extract (approximately 3.5 kg each) was obtained by separating cake and filtering. . A powdered base material (2 kg) described in Table 1 was added to the pigment extract, mixed, and dissolved in deoxygenated water so that the solid content concentration was 5 (W / W)%. Spray drying was performed at a temperature of 90 ° C. to obtain about 1.9 kg of each of the samples A to N of the dye-containing dried product. The residual ethanol concentrations in the obtained dye-containing dried products A to N were all less than 1 (W / W)%.
[0017]
[Table 1]
Figure 2004049201
[0018]
The dried matter containing the pigment and the matcha used as the raw material were put in a transparent polypropylene bag, stored at room temperature under light exposure for one month, and the change over time in color tone was examined by visual inspection. As a result, the raw material matcha faded to pure white. However, as shown in Table 2, the storage stability of the dye-containing dried products A to N under exposure was good. In particular, the concentration of the aqueous ethanol solution used at the time of dye extraction was 50 to 100. (W / W)% was good. In addition, the results of H to N using cyclodextrin as the powdered base material were better than those of A to G not using cyclodextrin. After the storage test was completed, 0.5 g of each of the pigment-containing dried products A to N was collected and dissolved in 150 ml of cold water, and no altered odor was observed in any of the aromas, and the flavor was good. Was.
[0019]
[Table 2]
Figure 2004049201
[0020]
(Example 1)
1 kg of matcha was added to a 95% ethanol aqueous solution (4 kg), and the mixture was stirred and extracted at 25 ° C. for 5 minutes. After squeezing, it was clarified by centrifugation to obtain 3.3 kg of a pigment extract. To this dye extract, 5 kg of Celldex SL-20 (manufactured by Japan Food Processing Co., Ltd.), a dextrin preparation containing cyclodextrin, was added, and the solid content was adjusted to 10 (W / W)% with distilled water. After mixing and dissolving so as to obtain, spray drying was performed under the condition of a chamber temperature of 95 ° C. to obtain 3.5 kg of a dye-containing dried product P.
[0021]
The pigment-containing dried product P is added to a granule of a commercially available instant green tea (Shincha Sensen Josen (manufactured by Sato Food Industry Co., Ltd.)) at a concentration of 5 (W / W)%, and hot water is poured to add flavor. As a result, a bright green color was exhibited and light blue could be improved.
[0022]
(Example 2)
0.8 kg of a dextrin preparation containing cyclodextrin (trade name: Dexy Pearl K-50 (manufactured by Shiomizu Port Refining Co., Ltd.)) and 80 g of β-cyclodextrin (trade name: Celldex B-100 manufactured by Nippon Shokuhin Kako Co., Ltd.) It was dissolved in 12 kg of hot water at 80 ° C. 1 kg of green tea leaves were added to this solution, extracted at 70 ° C. for 10 minutes while stirring, and lees was separated to obtain 11 kg of an extract having a solid content of 8 (W / W)%. The extract was clarified by a centrifugal separator, heated to 25 ° C., and concentrated by reverse osmosis membrane to obtain 7 kg of a concentrate having a solid content of 12 (W / W)%. 0.7 kg of the pigment extract obtained in Example 1 was added and mixed, then preliminarily frozen at −40 ° C., freeze-dried under the conditions of a vacuum of 1 Torr and a shelf heating temperature of 30 ° C., and 0.8 kg of instant green tea. Obtained.
[0023]
After dissolving this instant green tea in boiling water under the condition of 1 g / 120 ml, the flavor was observed to be clear, high-grade greenish light blue. In addition, this instant green tea was stored under light exposure for 1 month at room temperature according to Test Example 1, but the color tone and flavor were hardly changed, and the storage stability was good.
[0024]
【The invention's effect】
By using the present invention, it is possible to obtain a pigment-containing dried product that hardly deteriorates in flavor such as color tone and aroma even when stored under exposure for a long time, from pigments extracted from green plants such as teas.

Claims (6)

緑色植物から色素を有機溶剤抽出した後に、粉末化基材存在下で乾燥することを特徴とする色素含有乾燥物の製造方法A method for producing a pigment-containing dried product, comprising extracting a pigment from a green plant with an organic solvent and drying the extract in the presence of a powdered substrate. 有機溶剤が50〜100(W/W)%の親水性有機溶剤の水溶液であることを特徴とする、請求項1に記載の色素含有乾燥物の製造方法The method for producing a dye-containing dried product according to claim 1, wherein the organic solvent is an aqueous solution of a hydrophilic organic solvent of 50 to 100 (W / W)%. 粉末化基材にサイクロデキストリンが含まれることを特徴とする、請求項1及び2に記載の色素含有乾燥物の製造方法The method for producing a dye-containing dried product according to claim 1, wherein the powdered base material contains cyclodextrin. 緑色植物が茶類であることを特徴とする、請求項1〜3に記載の色素含有乾燥物の製造方法The method for producing a pigment-containing dried product according to any one of claims 1 to 3, wherein the green plant is tea. 茶類エキス存在下で、乾燥粉末化することを特徴とする、請求項1〜4に記載の色素含有乾燥物の製造方法The method for producing a pigment-containing dried product according to any one of claims 1 to 4, wherein the process is carried out in the form of a dry powder in the presence of a tea extract. 請求項1〜5に記載の色素含有乾燥物とインスタント茶類との混合物A mixture of the dye-containing dried product according to claim 1 and an instant tea.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1785038A1 (en) * 2004-08-06 2007-05-16 Kao Corporation Process for producing nonpolymeric catechin containing tea extract
JP2007267722A (en) * 2006-03-31 2007-10-18 Sato Shokuhin Kogyo Kk Method for producing tea extract powder having defoaming and foam-suppressing effect, and instant tea using the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1785038A1 (en) * 2004-08-06 2007-05-16 Kao Corporation Process for producing nonpolymeric catechin containing tea extract
EP1785038A4 (en) * 2004-08-06 2009-07-29 Kao Corp Process for producing nonpolymeric catechin containing tea extract
US7901720B2 (en) 2004-08-06 2011-03-08 Kao Corporation Process for producing tea extract containing nonpolymeric catechin
JP2007267722A (en) * 2006-03-31 2007-10-18 Sato Shokuhin Kogyo Kk Method for producing tea extract powder having defoaming and foam-suppressing effect, and instant tea using the same

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