JP3569274B2 - Packaged beverage - Google Patents
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- JP3569274B2 JP3569274B2 JP2002354965A JP2002354965A JP3569274B2 JP 3569274 B2 JP3569274 B2 JP 3569274B2 JP 2002354965 A JP2002354965 A JP 2002354965A JP 2002354965 A JP2002354965 A JP 2002354965A JP 3569274 B2 JP3569274 B2 JP 3569274B2
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- green tea
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- tea extract
- catechins
- beverage
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Description
【0001】
【発明の属する技術分野】
本発明は非重合体カテキン類を高濃度に含有し、かつ味の良好な容器詰飲料に関する。
【0002】
【従来の技術】
カテキン類の効果としてはコレステロール上昇抑制作用やαアミラーゼ活性阻害作用などが報告されている(例えば、特許文献1、特許文献2参照)。このような生理効果を発現させるためには、成人一日あたり4〜5杯のお茶を飲むことが必要であることから、より簡便に大量のカテキン類を摂取するために、飲料にカテキン類を高濃度配合する技術が望まれていた。この方法の一つとして、緑茶濃縮物(例えば、特許文献3〜5参照)などを利用して、カテキン類を飲料に溶解状態で添加する方法がある。
【0003】
しかしながら、緑茶濃縮物を用いると、溶解したカテキン類が苦味、渋味を呈するとともに、緑茶濃縮物に含まれるその他の成分によって、苦味、渋味、エグ味、雑味が強すぎるものとなってしまう。これを緩和すべく各種の甘味料などを配合することにより、飲用時の苦味、渋味を緩和する方法はある。しかしながらこの方法は甘味によるマスキング法であることから、完全な渋味や苦味の低減には限界があるとともに、エグ味や雑味は依然存在するものになってしまうという問題があった。
【0004】
一方、緑茶抽出物の高純度精製物を使用した場合、低濃度の非重合体カテキン類を配合した飲料においては、緑茶抽出物の高純度精製物由来の呈味はほとんど感じられないものの、高濃度の非重合体カテキン類を配合した飲料においては、緑茶抽出物の高純度精製物からくる人口的な刺すような苦味が感じられ飲用には適当でないという問題があった。
【0005】
【特許文献1】
特開昭60−156614号公報
【特許文献2】
特開平3−133928号公報
【特許文献3】
特開昭59−219384号公報
【特許文献4】
特開平4−20589号公報
【特許文献5】
特開昭61−130285号公報
【0006】
【発明が解決しようとする課題】
本発明の目的は、高濃度のカテキン類を含有し、かつ苦味、渋味を低減すると同時に甘味料配合法によっては出し得なかった清涼感のある飲料を提供することにある。
【0007】
【課題を解決するための手段】
本発明者は、高濃度のカテキン類を含有する容器詰飲料の味を改善すべく、種々検討した結果、高濃度の非重合体カテキン類を含有する緑茶抽出物を配合し、かつ非重合体カテキン類に対するシュウ酸比率をコントロールすることにより、渋味、苦味を低減しかつ清涼感のある容器詰飲料が得られることを見出した。
【0008】
本発明は、非重合体カテキン類を30〜50重量%含有する緑茶抽出物を配合した容器詰飲料であって、次の成分(A)及び(B)、
(A)非重合体カテキン類 0.092〜0.5重量%、
(B)シュウ酸
を含有し、成分(B)と(A)の含有重量比[(B)/(A)]が0.002〜0.05である容器詰飲料を提供するものである。
【0009】
【発明の実施の形態】
本発明で非重合体カテキン類とは、カテキン、ガロカテキン、カテキンガレート、ガロカテキンガレートなどの非エピ体カテキン類及びエピカテキン、エピガロカテキン、エピカテキンガレート、エピガロカテキンガレートなどのエピ体カテキン類をあわせての総称である。
【0010】
本発明で用いる緑茶抽出物中の非重合体カテキン類の濃度は、30〜50重量%、好ましくは30〜45重量%、更に好ましくは30〜40重量%、特に好ましくは35〜40重量%がよい。緑茶抽出物中の非重合体カテキン類の濃度が、30重量%未満の場合、緑茶抽出物中に含まれる他の呈味成分の影響が前面に出てしまい、これを配合した高濃度の非重合体カテキン類飲料は嫌味のある渋味を感じると共に、清涼感のない飲料になる傾向がある。緑茶抽出物中の非重合体カテキン類の濃度が、50重量%を超える場合、緑茶抽出物の非重合体カテキン類以外の旨味の成分などをシュウ酸と共に除去し過ぎてしまう傾向がある。
【0011】
ここでいう非重合体カテキン類の濃度は、カテキン、ガロカテキン、カテキンガレート、ガロカテキンガレート、エピカテキン、エピガロカテキン、エピカテキンガレート及びエピガロカテキンガレートの合計8種の合計量に基づいて定義される。
【0012】
本発明の容器詰飲料の成分(B)と成分(A)の含有重量比[(B)/(A)]は、0.002〜0.05であり、好ましくは0.002〜0.04、更に好ましくは0.0025〜0.03、特に好ましくは0.0025〜0.02である。当該成分(B)と(A)の含有比率は、緑茶抽出物を精製することにより調整できる。用いる緑茶抽出物中のシュウ酸比率が低すぎると、緑茶抽出物の非重合体カテキン類以外の旨味の成分などをシュウ酸と共に除去し過ぎてしまうことになり、飲料に配合したときの味の改善が十分でない。また用いる緑茶抽出物中のシュウ酸比率が高すぎると、緑茶濃縮物で感じられたような、嫌味のある渋味を感じると共に、清涼感のない飲料になってしまい好ましくない。
【0013】
本発明の容器詰飲料中には、非重合体であって水に溶解状態にある(A)非重合体カテキン類を、0.092〜0.5重量%含有するが、好ましくは0.1〜0.4重量%、更に好ましくは0.11〜0.3重量%、特に好ましくは0.12〜0.3重量%含有する。非重合体カテキン類含量がこの範囲にあると、多量の非重合カテキン類を容易に取り易く、強烈な苦味、渋味、強い収斂性が生じない。当該非重合体カテキン類の濃度は、緑茶抽出物の配合量によって調整することができる。
【0014】
ここでいう緑茶抽出物とは、茶葉から熱水もしくは水溶性有機溶媒により抽出された抽出物を濃縮したものを更に精製したもの、あるいは抽出された濃縮物を直接精製したものであって、特許文献3〜5などに詳細に例示されている方法を応用することで、非重合体カテキン類(A)とシュウ酸(B)の比率を調整することにより得ることができる。また市販の三井農林(株)「ポリフェノン」、伊藤園(株)「テアフラン」、太陽化学(株)「サンフェノン」などの緑茶濃縮物を用い、これらの非重合カテキン類(A)とシュウ酸(B)の成分調整を行うことにより、本発明の目的に適う緑茶抽出物を得ることもできる。
【0015】
緑茶濃縮物の精製手段としては、例えば緑茶濃縮物を水と有機溶媒の混合物に懸濁し、これに有機溶媒を添加することにより生じた沈殿を除去し、次いで溶媒を留去する方法;緑茶濃縮物を水と有機溶媒の混合物に溶解し、これに有機溶媒を添加することにより生じた沈殿を除去し、次いで溶媒を留去する方法等が挙げられる。
ここでいう緑茶抽出物の形態としては、固体、水溶液、スラリー状など種々のものが挙げられる。
【0016】
本発明に使用する緑茶としては、Camellia属、例えばC. sinensis、C. assamica及びやぶきた種、又はそれらの雑種から得られる茶葉から製茶された茶葉が挙げられる。当該製茶された茶葉には、煎茶、番茶、玉露、てん茶、釜炒り茶などの緑茶類がある。
【0017】
本発明の容器詰飲料は、前記特定の緑茶抽出物を配合した飲料であり、当該精製物の配合対象としては緑茶、半発酵茶及び発酵茶から選ばれた茶の抽出液;及び非茶系飲料が挙げられる。このうち、茶の抽出液に前記精製物を配合した飲料が好ましく、緑茶の抽出液に前記精製物を配合した緑茶飲料とするのが特に好ましい。半発酵茶としては烏龍茶が挙げられ、発酵茶としては紅茶が挙げられる。また非茶系飲料としては例えばソフトドリンクである炭酸飲料、果実エキス入り飲料、野菜エキス入りジュース、ニアウォーター、スポーツ飲料、ダイエット飲料などが挙げられる。
【0018】
本発明で用いる緑茶抽出物中の非重合体カテキン類はエピガロカテキンガレート、ガロカテキンガレート、エピガロカテキン及びガロカテキンからなるガロ体と、エピカテキンガレート、カテキンガレート、エピカテキン及びカテキンからなる非ガロ体の比率が、天然の緑茶葉の組成を維持している方が好ましい。したがって上記4種のガロ体総量は常に上記4種の非ガロ体総量を上回っているのが精製物においても天然の緑茶葉の組成を維持しているという点において好ましい。
【0019】
また、本発明で用いる緑茶抽出物中のカテキンガレートとエピカテキンガレートとガロカテキンガレートとエピガロカテキンガレートからなるガレート体の全非重合体カテキン類中での割合が45重量%以上が、非重合体カテキン類の生理効果の有効性上好ましい。
【0020】
本発明で用いる緑茶抽出物中のシュウ酸の濃度は、0.05〜1.5重量%、好ましくは0.05〜1.0重量%、更に好ましくは0.05〜0.5重量%、特に好ましくは0.08〜0.3重量%がよい。緑茶抽出物中のシュウ酸の濃度が、1.5重量%を超える場合、緑茶抽出物中に含まれる他の呈味成分の影響が前面に出てしまい、これを配合した高濃度の非重合体カテキン類飲料は嫌味のある渋味を感じると共に、清涼感のない飲料になってしまう傾向がある。緑茶抽出物中の非重合体カテキン類の濃度が、0.05重量%未満の場合、緑茶抽出物の非重合カテキン類以外の旨味の成分などをシュウ酸と共に除去し過ぎてしまう傾向がある。
【0021】
本発明の容器詰飲料は、苦味抑制剤を配合すると、服用しやすくなり、好ましい。用いる苦味抑制剤は特に限定はないが、サイクロデキストリンが好ましい。サイクロデキストリンとしては、α−、β−、γ−サイクロデキストリン及び分岐α−、β−、γ−サイクロデキストリンが使用できる。サイクロデキストリンは飲料中に0.01〜0.5重量%、好ましくは0.01〜0.3重量%含有するのがよい。
【0022】
飲料のpHは、25℃で2〜7、好ましくは3〜7、より好ましくは5〜7とするのが非重合カテキン類の化学的安定性の点で好ましい。
【0023】
本発明の容器詰飲料には、茶由来の成分にあわせて、処方上添加して良い成分として、酸化防止剤、香料、各種エステル類、有機酸類、有機酸塩類、無機酸類、無機酸塩類、無機塩類、色素類、乳化剤、保存料、調味料、甘味料、酸味料、果汁エキス類、野菜エキス類、花蜜エキス類、pH調整剤、品質安定剤などの添加剤を単独、あるいは併用して配合しても良い。
【0024】
例えば甘味料としては、砂糖、ぶどう糖、果糖、異性化液糖、グリチルリチン、ステビア、アスパラテーム、フラクトオリゴ糖、ガラクトオリゴ糖などが挙げられる。酸味料としては、天然成分から抽出した果汁類のほか、クエン酸、酒石酸、リンゴ酸、乳酸、フマル酸、リン酸が挙げられる。飲料中に0.01〜0.5重量%、好ましくは0.01〜0.3重量%含有するのがよい。
無機酸類、無機酸塩類としてはリン酸、リン酸二ナトリウム、メタリン酸ナトリウム、ポリリン酸ナトリウムなどが挙げられる。飲料中に0.01〜0.5重量%、好ましくは0.01〜0.3重量%含有するのがよい。
【0025】
本発明の容器詰飲料に使用される容器は、一般の飲料と同様にポリエチレンテレフタレートを主成分とする成形容器(いわゆるPETボトル)、金属缶、金属箔やプラスチックフィルムと複合された紙容器、瓶などの通常の形態で提供することができる。ここでいう容器詰飲料とは希釈せずに飲用できるものをいう。
【0026】
また本発明の容器詰飲料は、例えば、金属缶のように容器に充填後、加熱殺菌できる場合にあっては食品衛生法に定められた殺菌条件で製造される。PETボトル、紙容器のようにレトルト殺菌できないものについては、あらかじめ上記と同等の殺菌条件、例えばプレート式熱交換器などで高温短時間殺菌後、一定の温度迄冷却して容器に充填する等の方法が採用される。また無菌下で、充填された容器に別の成分を配合して充填してもよい。更に、酸性下で加熱殺菌後、無菌下でpHを中性に戻すことや、中性下で加熱殺菌後、無菌下でpHを酸性に戻すなどの操作も可能である。
【0027】
【実施例】
カテキン類の測定
フィルター(0.8μm)でろ過し、次いで蒸留水で希釈した容器詰飲料を、島津製作所製、高速液体クロマトグラフ(型式SCL−10AVP)を用い、オクタデシル基導入液体クロマトグラフ用パックドカラム L−カラムTM ODS(4.6mmφ×250mm:財団法人 化学物質評価研究機構製)を装着し、カラム温度35℃でグラジエント法により行った。移動相A液は酢酸を0.1mol/L含有の蒸留水溶液、B液は酢酸を0.1mol/L含有のアセトニトリル溶液とし、試料注入量は20μL、UV検出器波長は280nmの条件で行った。
【0028】
シュウ酸の測定
日本ダイオネックス社製(形式DXAQ1110)にカラム:IonPacAS4A−SC、4×250mmを装着し、サプレッサーASRS−ULTRA(ダイオネックス社製)に接続し、リサイクルモードで行った。移動相は1.8mmol/L Na2CO3/1.7mmol/L NaHCO3を1.0mL/minで流し、試料注入量は25μLとした。検出器は電気伝導度計を使用した。
【0029】
実施例1〜3、比較例1〜3
表1に示す成分を混合して、所定の後処理を行い、容器詰飲料を製造した。
【0030】
【表1】
【0031】
(*1)緑茶抽出物
ポリフェノンHG(東京フードテクノ製)100gを270gの水に溶解する。次にこのポリフェノールHG水溶液に99.5重量%エタノールを630gを30分で滴下した。その後、攪拌しつつ30分間熟成した。熟成後、2号ろ紙にて荒濾過後、0.2μmメッシュを持つろ紙で濾過し生成していた不溶分を取り除いた。ここで得た濾過液に水200mLを加え、減圧濃縮後、凍結乾燥を施した。
得られた緑茶抽出物:非重合体カテキン類含有量37.71重量%、シュウ酸含有量0.11重量%、シュウ酸/非重合体カテキン類=0.0029。
(*2)緑茶抽出物
ポリフェノンHG(東京フードテクノ製)100gを99.5重量%エタノール630gに分散させる。水270gを10分で滴下した。その後、攪拌しつつ30分熟成した。熟成後、2号ろ紙にて荒濾過後、0.2μmメッシュを持つろ紙で濾過し残存していた不溶分を取り除いた。ここで得た濾過液に水200mLを加え、減圧濃縮後、凍結乾燥を施した。
得られた緑茶抽出物:非重合体カテキン類含有量37.68重量%、シュウ酸含有量0.25重量%、シュウ酸/非重合体カテキン類=0.0066。
(*3)緑茶濃縮物
ポリフェノンHG(東京フードテクノ製)
非重合体カテキン類含有量33.70重量%、シュウ酸含有量2.03重量%
シュウ酸/非重合体カテキン類=0.060
(*4)緑茶抽出物の高純度精製物
ポリフェノン70(東京フードテクノ製)
非重合体カテキン類含有量81.7重量%、シュウ酸含有量0重量%
シュウ酸/非重合体カテキン類=0
(*5)緑茶抽出液の凍結乾燥品
90℃に加温した1000gの湯中に煎茶葉を40g加え、穏やかに攪拌しながら5分間抽出を行った。抽出後二枚重ねの2号ろ紙にて濾過を行い、濾過液は速やかに室温まで冷却した。この抽出液を凍結乾燥した。
得られた緑茶抽出液の凍結乾燥品:非重合体カテキン類含有量33.7重量%、シュウ酸含有量2.54重量%。
(*6)レモン果汁濃縮液(市販品)
(*7)市販飲用水 表示カルシウム含有量7.1mg/100mL、マグネシウム含有量2.4mg/100mL、ナトリウム含有量4.7mg/100mL
【0032】
パネラー3名による飲用試験の結果、非重合体カテキン類を高濃度で配合した飲料において、3名が実施例1から3は、飲用時の渋味が低減し、飲用後の清涼感が増しており、特に実施例1においてはその効果が顕著であることを認めた。これに対して比較例2では渋味と共に飲用後の清涼感が感じられなかった。また比較例3においては渋味はそれほどではないものの、人工的な刺すような苦味が感じられ飲用に耐えないものとなった。
【0033】
【発明の効果】
本発明の飲料は、非重合体カテキン類を高濃度含有し、かつ渋み、苦味がなく、清涼感があり、常飲に適している。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a packaged beverage containing a high concentration of non-polymer catechins and having good taste.
[0002]
[Prior art]
As the effects of catechins, a cholesterol increase inhibitory action and an α-amylase activity inhibitory action have been reported (for example, see Patent Documents 1 and 2). In order to express such physiological effects, it is necessary to drink 4 to 5 cups of tea per day for an adult. Therefore, in order to more easily ingest a large amount of catechins, catechins are added to the beverage. There has been a demand for a technique of blending at a high concentration. As one of the methods, there is a method in which catechins are added to a beverage in a dissolved state using a green tea concentrate (for example, see Patent Documents 3 to 5).
[0003]
However, when a green tea concentrate is used, the dissolved catechins exhibit bitterness and astringency, and due to other components contained in the green tea concentrate, bitterness, astringency, astringency, and unpleasant taste become too strong. I will. There is a method of reducing bitterness and astringency at the time of drinking by blending various sweeteners to alleviate this. However, since this method is a masking method using sweetness, there is a problem that there is a limit to complete reduction of astringency and bitterness, and that astringent taste and unpleasant taste still exist.
[0004]
On the other hand, when a high-purity purified green tea extract is used, in a beverage containing a low-concentration non-polymer catechin, the taste derived from the high-purity purified green tea extract is hardly felt, Beverages containing non-polymer catechins at a high concentration have a problem that they are not suitable for drinking because of the artificial biting bitterness coming from the highly purified purified green tea extract.
[0005]
[Patent Document 1]
JP-A-60-156614 [Patent Document 2]
Japanese Patent Application Laid-Open No. 3-13928 [Patent Document 3]
JP-A-59-219384 [Patent Document 4]
JP-A-4-20589 [Patent Document 5]
JP-A-61-130285 [0006]
[Problems to be solved by the invention]
An object of the present invention is to provide a refreshing beverage which contains a high concentration of catechins and which has a reduced bitterness and astringency and which cannot be produced by a sweetener blending method.
[0007]
[Means for Solving the Problems]
The present inventors have conducted various studies in order to improve the taste of a packaged beverage containing a high concentration of catechins, and as a result, blended a green tea extract containing a high concentration of a non-polymer catechin, and a non-polymer By controlling the ratio of oxalic acid to catechins, it has been found that a packaged beverage with reduced astringency and bitterness and a refreshing feeling can be obtained.
[0008]
The present invention is a packaged beverage containing a green tea extract containing 30 to 50% by weight of a non-polymer catechin, and comprises the following components (A) and (B):
(A) non-polymer catechins 0.092 to 0.5% by weight,
(B) A packaged beverage containing oxalic acid and having a weight ratio [(B) / (A)] of components (B) and (A) of 0.002 to 0.05.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
In the present invention, the non-polymer catechins are catechin, gallocatechin, catechin gallate, non-epitopic catechins such as gallocatechin gallate and epicatechin, epigallocatechin, epicatechin gallate, and epi-catechins such as epigallocatechin gallate. Is a collective term for
[0010]
The concentration of the non-polymer catechins in the green tea extract used in the present invention is 30 to 50% by weight, preferably 30 to 45% by weight, more preferably 30 to 40% by weight, and particularly preferably 35 to 40% by weight. Good. When the concentration of the non-polymer catechins in the green tea extract is less than 30% by weight, the influence of other taste components contained in the green tea extract comes to the fore, and a high concentration non-polymer catechin containing the same is added. Polymer catechin beverages tend to be refreshing beverages with an astringent astringency and a refreshing sensation. If the concentration of the non-polymer catechins in the green tea extract exceeds 50% by weight, components of the umami other than the non-polymer catechins in the green tea extract tend to be removed too much together with oxalic acid.
[0011]
The concentration of the non-polymer catechins referred to herein is defined based on the total amount of catechin, gallocatechin, catechin gallate, gallocatechin gallate, epicatechin, epigallocatechin, epicatechin gallate, and epigallocatechin gallate. You.
[0012]
The content weight ratio [(B) / (A)] of the component (B) and the component (A) of the packaged beverage of the present invention is 0.002 to 0.05, preferably 0.002 to 0.04. , More preferably 0.0025 to 0.03, particularly preferably 0.0025 to 0.02. The content ratio of the components (B) and (A) can be adjusted by purifying the green tea extract. If the oxalic acid ratio in the green tea extract used is too low, umami components and the like other than the non-polymer catechins of the green tea extract will be excessively removed together with oxalic acid, and the taste of the beverage when blended in a beverage Not enough improvement. On the other hand, if the oxalic acid ratio in the green tea extract used is too high, the beverage has an unpleasant astringent taste as felt in a green tea concentrate and becomes a beverage without a refreshing sensation.
[0013]
The packaged beverage of the present invention contains 0.092 to 0.5% by weight of the non-polymeric catechins (A) which are non-polymeric and dissolved in water, preferably 0.1 to 0.1% by weight. To 0.4% by weight, more preferably 0.11 to 0.3% by weight, particularly preferably 0.12 to 0.3% by weight. When the content of the non-polymer catechins is in this range, a large amount of non-polymer catechins can be easily obtained, and strong bitterness, astringency and strong astringency do not occur. The concentration of the non-polymer catechins can be adjusted by the amount of the green tea extract.
[0014]
The green tea extract referred to here is a product obtained by further concentrating an extract extracted from tea leaves with hot water or a water-soluble organic solvent, or a product obtained by directly purifying the extracted concentrate. It can be obtained by adjusting the ratio of the non-polymer catechins (A) and oxalic acid (B) by applying a method exemplified in detail in Documents 3 to 5. In addition, commercially available green tea concentrates such as Mitsui Norin Co., Ltd. "Polyphenon", Itoen Co., Ltd. "Theafuran", Taiyo Kagaku Co., Ltd. "Sanphenone", etc. are used, and these unpolymerized catechins (A) and oxalic acid (B The green tea extract suitable for the purpose of the present invention can be obtained by performing the component adjustment of (3).
[0015]
As a means for purifying the green tea concentrate, for example, a method of suspending the green tea concentrate in a mixture of water and an organic solvent, removing a precipitate formed by adding an organic solvent thereto, and then distilling off the solvent; A method in which the substance is dissolved in a mixture of water and an organic solvent, a precipitate formed by adding the organic solvent to the mixture is removed, and then the solvent is distilled off.
Examples of the form of the green tea extract here include various forms such as a solid, an aqueous solution, and a slurry.
[0016]
Green tea used in the present invention includes Camellia sp. sinensis, C.I. tea leaves produced from tea leaves obtained from assamica and Yabutaki seeds, or hybrids thereof. The tea leaves thus produced include green teas such as sencha, bancha, gyokuro, tencha, and roasted tea.
[0017]
The packaged beverage of the present invention is a beverage containing the above-mentioned specific green tea extract, and a target of blending the purified product is a tea extract selected from green tea, semi-fermented tea and fermented tea; Drinks. Among them, a beverage in which the purified product is mixed with a tea extract is preferable, and a green tea beverage in which the purified product is mixed with a green tea extract is particularly preferable. Oolong tea is mentioned as semi-fermented tea, and black tea is mentioned as fermented tea. Examples of the non-tea beverage include soft drinks such as carbonated beverages, beverages containing fruit extracts, juices containing vegetable extracts, near water, sports beverages, and diet beverages.
[0018]
The non-polymer catechins in the green tea extract used in the present invention are epigallocatechin gallate, gallocatechin gallate, a gallo body composed of epigallocatechin and gallocatechin, and epicatechin gallate, non-gallo composed of catechin gallate, epicatechin and catechin. It is preferred that the body proportions maintain the composition of natural green tea leaves. Therefore, it is preferable that the total amount of the four types of gallo bodies always exceeds the total amount of the four types of non-gallo bodies in that the composition of natural green tea leaves is maintained even in the purified product.
[0019]
In the green tea extract used in the present invention, the ratio of gallates composed of catechin gallate, epicatechin gallate, gallocatechin gallate and epigallocatechin gallate in all non-polymer catechins is not less than 45% by weight. It is preferable in terms of the effectiveness of the physiological effect of the combined catechins.
[0020]
The concentration of oxalic acid in the green tea extract used in the present invention is 0.05 to 1.5% by weight, preferably 0.05 to 1.0% by weight, more preferably 0.05 to 0.5% by weight, Particularly preferably, the content is 0.08 to 0.3% by weight. When the concentration of oxalic acid in the green tea extract exceeds 1.5% by weight, the influence of other taste components contained in the green tea extract comes to the fore, and a high-concentration non-heavy weight containing this is added. Combined catechin beverages tend to feel astringent with an unpleasant taste and become refreshing beverages. When the concentration of the non-polymer catechins in the green tea extract is less than 0.05% by weight, components of umami other than the non-polymer catechins in the green tea extract tend to be removed together with oxalic acid.
[0021]
When the packaged beverage of the present invention contains a bitterness suppressant, it is easy to take and is preferable. The bitterness suppressor used is not particularly limited, but cyclodextrin is preferred. As cyclodextrin, α-, β-, γ-cyclodextrin and branched α-, β-, γ-cyclodextrin can be used. The cyclodextrin may be contained in the beverage in an amount of 0.01 to 0.5% by weight, preferably 0.01 to 0.3% by weight.
[0022]
The pH of the beverage at 25C is preferably 2 to 7, preferably 3 to 7, and more preferably 5 to 7 in view of the chemical stability of the non-polymerized catechins.
[0023]
In the packaged beverage of the present invention, in accordance with the components derived from tea, as components that may be added in the formulation, antioxidants, flavors, various esters, organic acids, organic acid salts, inorganic acids, inorganic acid salts, Additives such as inorganic salts, pigments, emulsifiers, preservatives, seasonings, sweeteners, sour agents, fruit juice extracts, vegetable extracts, nectar extracts, pH adjusters, quality stabilizers, alone or in combination You may mix.
[0024]
For example, examples of the sweetener include sugar, glucose, fructose, isomerized liquid sugar, glycyrrhizin, stevia, aspartame, fructooligosaccharide, galactooligosaccharide and the like. Examples of the acidulant include juice extracted from natural components, citric acid, tartaric acid, malic acid, lactic acid, fumaric acid, and phosphoric acid. The beverage may contain 0.01 to 0.5% by weight, preferably 0.01 to 0.3% by weight.
Examples of inorganic acids and inorganic acid salts include phosphoric acid, disodium phosphate, sodium metaphosphate, sodium polyphosphate and the like. The beverage may contain 0.01 to 0.5% by weight, preferably 0.01 to 0.3% by weight.
[0025]
Containers used for the packaged beverage of the present invention include molded containers (so-called PET bottles) containing polyethylene terephthalate as a main component, metal cans, paper containers composited with metal foils and plastic films, bottles, like ordinary beverages. And the like. Here, the packaged beverage means a beverage that can be drunk without dilution.
[0026]
The packaged beverage of the present invention is manufactured under sterilization conditions specified in the Food Sanitation Law, for example, when it can be heat-sterilized after filling into a container such as a metal can. For PET bottles and paper containers that cannot be retort sterilized, sterilization conditions equivalent to those described above in advance, for example, after sterilizing at a high temperature for a short time with a plate heat exchanger, etc., cool to a certain temperature and fill the container. The method is adopted. Further, another component may be blended and filled in the filled container under aseptic conditions. Further, operations such as returning the pH to neutral under aseptic conditions after heat sterilization under acidic conditions, and returning the pH to acidic under sterile conditions after heat sterilization under neutral conditions are also possible.
[0027]
【Example】
Measurement of catechins The packaged beverage filtered with a filter (0.8 μm) and then diluted with distilled water was subjected to octadecyl group-introduced liquid using a high performance liquid chromatograph (model SCL-10AVP) manufactured by Shimadzu Corporation. A packed column for chromatography, L-column TM ODS (4.6 mmφ × 250 mm: manufactured by Chemicals Evaluation and Research Institute) was installed, and the column method was performed at a column temperature of 35 ° C. by a gradient method. The mobile phase A liquid was a distilled aqueous solution containing 0.1 mol / L of acetic acid, and the liquid B was an acetonitrile solution containing 0.1 mol / L of acetic acid. The injection amount of the sample was 20 μL, and the wavelength of the UV detector was 280 nm. .
[0028]
Measurement of oxalic acid A column: IonPacAS4A-SC, 4 × 250 mm was attached to Nippon Dionex (model DXAQ1110), and connected to a suppressor ASRS-ULTRA (Dionex) to perform a recycling mode. . As the mobile phase, 1.8 mmol / L Na 2 CO 3 /1.7 mmol / L NaHCO 3 was flowed at 1.0 mL / min, and the sample injection amount was 25 μL. The detector used was an electric conductivity meter.
[0029]
Examples 1-3, Comparative Examples 1-3
The components shown in Table 1 were mixed and subjected to predetermined post-treatment to produce a packaged beverage.
[0030]
[Table 1]
[0031]
(* 1) 100 g of green tea extract polyphenon HG (manufactured by Tokyo Food Techno) is dissolved in 270 g of water. Next, 630 g of 99.5% by weight ethanol was dropped into this aqueous solution of polyphenol HG in 30 minutes. Then, it aged for 30 minutes while stirring. After aging, the resultant was roughly filtered through a No. 2 filter paper, and then filtered through a filter paper having a mesh of 0.2 μm to remove insoluble components generated. 200 mL of water was added to the filtrate obtained here, concentrated under reduced pressure, and freeze-dried.
Obtained green tea extract: non-polymer catechins content 37.71% by weight, oxalic acid content 0.11% by weight, oxalic acid / non-polymer catechins = 0.0029.
(* 2) 100 g of green tea extract polyphenon HG (manufactured by Tokyo Food Techno) is dispersed in 630 g of 99.5% by weight ethanol. 270 g of water was added dropwise in 10 minutes. Then, it aged for 30 minutes while stirring. After aging, the mixture was roughly filtered through a No. 2 filter paper, and then filtered through a filter paper having a 0.2 μm mesh to remove remaining insolubles. 200 mL of water was added to the filtrate obtained here, concentrated under reduced pressure, and freeze-dried.
Green tea extract obtained: non-polymer catechins content 37.68% by weight, oxalic acid content 0.25% by weight, oxalic acid / non-polymer catechins = 0.0066.
(* 3) Green tea concentrate Polyphenon HG (manufactured by Tokyo Food Techno)
Non-polymer catechins content 33.70% by weight, oxalic acid content 2.03% by weight
Oxalic acid / non-polymer catechins = 0.060
(* 4) Polyphenon 70, a high-purity purified green tea extract (Tokyo Food Techno)
Non-polymer catechin content 81.7% by weight, oxalic acid content 0% by weight
Oxalic acid / non-polymer catechins = 0
(* 5) Lyophilized green tea extract solution 40 g of sencha leaf was added to 1000 g of hot water heated to 90 ° C., and extraction was performed for 5 minutes with gentle stirring. After the extraction, filtration was performed with two filter papers, and the filtrate was immediately cooled to room temperature. This extract was freeze-dried.
Lyophilized product of the obtained green tea extract: non-polymer catechins content 33.7% by weight, oxalic acid content 2.54% by weight.
(* 6) Lemon juice concentrate (commercially available)
(* 7) Commercial drinking water Indicated calcium content 7.1 mg / 100 mL, magnesium content 2.4 mg / 100 mL, sodium content 4.7 mg / 100 mL
[0032]
As a result of a drinking test by three panelists, in a beverage containing a non-polymer catechin at a high concentration, three persons of Examples 1 to 3 showed that the astringency at the time of drinking was reduced and the refreshing feeling after drinking was increased. In particular, it was recognized that the effect was remarkable in Example 1. On the other hand, in Comparative Example 2, the refreshing feeling after drinking was not felt together with the astringency. In Comparative Example 3, although the astringency was not so great, an artificial biting bitterness was felt, and it became unbearable for drinking.
[0033]
【The invention's effect】
The beverage of the present invention contains a high concentration of non-polymer catechins, has no astringency or bitterness, has a refreshing feeling, and is suitable for ordinary drinking.
Claims (4)
(A)非重合体カテキン類 0.092〜0.5重量%、
(B)シュウ酸
を含有し、成分(B)と(A)の含有重量比[(B)/(A)]が0.002〜0.05である容器詰飲料。A packaged beverage containing a green tea extract containing 30 to 50% by weight of a non-polymer catechin, comprising the following components (A) and (B):
(A) non-polymer catechins 0.092 to 0.5% by weight,
(B) A packaged beverage containing oxalic acid and having a weight ratio [(B) / (A)] of the components (B) and (A) of 0.002 to 0.05.
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