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JP4287583B2 - Green tea beverage with stable color tone - Google Patents
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JP4287583B2 - Green tea beverage with stable color tone - Google Patents

Green tea beverage with stable color tone Download PDF

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Publication number
JP4287583B2
JP4287583B2 JP2000350728A JP2000350728A JP4287583B2 JP 4287583 B2 JP4287583 B2 JP 4287583B2 JP 2000350728 A JP2000350728 A JP 2000350728A JP 2000350728 A JP2000350728 A JP 2000350728A JP 4287583 B2 JP4287583 B2 JP 4287583B2
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Japan
Prior art keywords
color tone
green tea
absorbance
tea beverage
change
Prior art date
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JP2000350728A
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Japanese (ja)
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JP2002142734A (en
Inventor
瑞夫 矢嶋
浩一 勝山
純子 浜島
賢康 室屋
一浩 吉永
真実 藤末
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Asama Chemical Co Ltd
Sunus Co Ltd
Original Assignee
Asama Chemical Co Ltd
Nihon Starch Co Ltd
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Priority to JP2000350728A priority Critical patent/JP4287583B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、色調安定な緑茶飲料に関し、さらに詳しくは、1,5−D−アンヒドロフルクトースを含有する色調安定な緑茶飲料に関する。
【0002】
【従来の技術】
茶系飲料は各茶の種類により特有の色調を有し、この色調は消費者の嗜好に訴え、変色等色調の変化はそれらの商品価値に影響を与える。茶系飲料は、従来、飲みきりタイプの缶入りが主流であったが、近年、消費者の利便性から、飲み残し可能なペットボトル入りへと消費が拡大している。缶入りの場合には光の影響による茶の色調の変化は問題にならなかったが、ペットボトル入りの消費が拡大するにつれ、光の影響による色調の変化が問題となってきた。従来、茶系飲料にはビタミンC若しくはそのナトリウム塩の添加が行われており、光照射下における色調の安定化にも或る程度効果があるが不十分であった。また、光の影響を少なくするため、緑色系のペットボトルも使用されてきたが、色調安定化効果がやはり不十分であった。
【0003】
【発明が解決しようとする課題】
そこで、本発明は、光照射下でも色調の安定な緑茶飲料を提供することを課題とする。
【0004】
【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鋭意研究の結果、緑茶飲料の色調安定化に1,5−D−アンヒドロフルクトースが有効であることを見出し、本発明に到達した。
【0005】
すなわち、本発明は、1,5−D−アンヒドロフルクトースを含有することを特徴とする色調安定な緑茶飲料を提供するものである。
【0006】
【発明の実施の形態】
本発明の緑茶飲料の茶としては流通・保存中の色調の変化が問題になる透明容器に包装された緑茶である。
【0009】
本発明において、色調安定剤として用いる1,5−D−アンヒドロフルクトース(以下、AFと略記する)は、オゴノリ等の紅藻の構成成分である無水単糖であり、これらの紅藻から抽出して用いることができる。または、澱粉にアミラーゼを作用させ、デキストリンとした後、酵素(α−1,4−グルカンリアーゼ)と反応させることでも容易に得られる。澱粉はジャガイモでもトウモロコシ由来でもよく、特に制限はない。アミラーゼは市販品、例えば、天野製薬(株)製が入手可能である。デキストリンからAFを生成させる酵素はオゴノリ等の紅藻から抽出して用いることができる。得られたAFは粗製のままでも、精製して用いてもよい。
【0010】
AFを緑茶飲料に添加することにより、緑茶飲料の色調の安定化をはかることができる。特に、緑茶の色素の耐光性を向上させる効果が得られる。
【0011】
AFは通常の濃度に浸出した緑茶飲料に対し、0.01〜10重量%の濃度で添加することが好ましい。AFの含有量が0.01%未満では色調安定化効果が不十分であり、一方10%を超えると、AFの有する苦味が感じられるようになり、好ましくない。さらに好ましい含有量は0.03〜3%である。
【0012】
本発明の色調安定な緑茶飲料には、水溶性酸化防止剤であるビタミンC、エリソルビン酸またはそれらのナトリウム塩を併用することができ、これらの併用により、さらに色調安定な緑茶飲料を得ることができる。この場合のそれらの化合物の添加量は、0.01〜1重量%である。
【0013】
【実施例】
以下に実施例を挙げて本発明をさらに詳細に説明するが、本発明はこれに限定されるものではない。なお、実施例中、AFは日本澱粉工業(株)製、固形分70.5%、AF純度41.2%を使用した。
【0014】
実施例1
水だし煎茶(松井製茶(株)製)のテイーバック8gを、オートクレーブ後冷却した滅菌水1リットルに浸漬し、一晩冷蔵庫中で抽出した。抽出液に表1の試験区に示す濃度でAFとビタミンCを添加した後、0.45μmのメンブランフィルターで濾過滅菌した。添加量は純品換算で示した。濾液10mlを45ml容の試験管に分注し、室温、光照射下で静置して保存した。褐変化(着色度)は、440nmにおける吸光度を経日的に測定し、調製直後の吸光度との差を吸光度変化として示した。表1に保存7日、14日、21日目の吸光度変化を5連の平均値で示した。
【0015】
AFまたはAFおよびビタミンCを添加した試験区の煎茶の調製直後の味と香りはこれらを添加しない抽出液(以下、対照区という)と差が認められず、色調安定剤の添加による品質上の悪影響は認められなかった。
【0016】
【表1】

Figure 0004287583
【0017】
表1に示すとおり、AFの添加により緑茶の褐変が抑制された。また、AFとビタミンCとの併用効果が認められた。
【0018】
実施例2
水だし煎茶(松井製茶(株)製)のテイーバック8gを、オートクレーブ後冷却した滅菌水1リットルに浸漬し、一晩冷蔵庫中で抽出した。抽出液に表1の試験区に示す濃度でAFとエリソルビン酸を添加した後、0.45μmのメンブランフィルターで濾過滅菌した。添加量は純品換算で示した。濾液10mlを45ml容の試験管に分注し、室温、光照射下で静置して保存した。褐変化(着色度)は、440nmにおける吸光度を経日的に測定し、調製直後の吸光度との差を吸光度変化として示した。表2に保存7日、14日、21日目の吸光度変化を5連の平均値で示した。
【0019】
AFまたはAFおよびエリソルビン酸を添加した試験区の煎茶の調製直後の味と香りは対照区と差が認められず、色調安定剤の添加による品質上の悪影響は認められなかった。
【0020】
【表2】
Figure 0004287583
【0021】
表2に示すとおり、AFの添加により緑茶の褐変が抑制された。また、AFとエリソルビン酸との併用効果が認められた。
【0022】
参考例1
市販の紅茶「リプトン ブリスク テイーバック」(リプトンジャパン(株))のテイーバック(1.8g)4個を、熱湯600ml中で2分間抽出した。抽出液を10000xg、30分間遠心した。抽出液に表の試験区に示す濃度でAFとビタミンCのナトリウム塩(アスコルビン酸ナトリウム)を添加した後、0.45μmのメンブランフィルターで濾過滅菌した。添加量は純品換算で示した。濾液10mlを45ml容の試験管に分注し、室温、光照射下で静置して保存した。褐変化(着色度)は、440nmにおける吸光度を経日的に測定し、調製直後の吸光度との差を吸光度変化として示した。表3に保存7日、14日、21日目の吸光度変化を5連の平均値で示した。
【0023】
AFまたはAFおよびアスコルビン酸ナトリウムを添加した試験区の紅茶の調製直後の味と香りは対照区と差が認められず、色調安定剤の添加による品質上の悪影響は認められなかった。
【0024】
【表3】
Figure 0004287583
【0025】
表3のように、紅茶の場合にはアスコルビン酸ナトリウムを添加すると、褪色が著しく促進された。それに反して、AFの場合は初期の褪色もほとんどなく、その後の褐変も抑えるという、色調の安定化に優れていた。
【0026】
参考例2
ウーロン茶抽出物「サンウーロン」(サントリー(株)製)0.4%水溶液を調製し、表4の試験区に示す濃度でAFとビタミンCを添加した後、0.45μmのメンブランフィルターで濾過滅菌した。添加量は純品換算で示した。濾液10mlを45ml容の試験管に分注し、室温、光照射下で静置して保存した。褐変化(着色度)は、440nmにおける吸光度を経日的に測定し、調製直後の吸光度との差を吸光度変化として示した。表4に保存7日、14日、21日目の吸光度変化を5連の平均値で示した。
【0027】
【表4】
Figure 0004287583
【0028】
表4に示すとおり、ウーロン茶の場合には、ビタミンCを添加すると、褪色が促進された。それに反して、AFの場合は褐変を抑制する効果があった。また、AFとビタミンCを併用することにより色調の安定化に優れていた。
【0029】
参考例3
マテ茶粉末8gをオートクレーブ後冷却した滅菌水1リットルに加え、冷蔵庫で一晩抽出した。表5の試験区に示す濃度でAFとビタミンCを添加した後、0.45μmのメンブランフィルターで濾過滅菌した。添加量は純品換算で示した。濾液10mlを45ml容の試験管に分注し、室温、光照射下で静置して保存した。褐変化(着色度)は、440nmにおける吸光度を経日的に測定し、調製直後の吸光度との差を吸光度変化として示した。表5に保存7日、14日、21日目の吸光度変化を5連の平均値で示した。
【0030】
【表5】
Figure 0004287583
【0031】
表5に示すとおり、AFによりマテ茶の褐変が抑制された。AFとビタミンCを併用することにより色調の安定化に優れていた。
【0032】
参考例4
ハーブ(レモンバウム)の乾燥葉8gをオートクレーブ後冷却した滅菌水1リットルに加え、冷蔵庫で一晩抽出した。表6の試験区に示す濃度でAFとエリソルビン酸ナトリウムを添加した後、0.45μmのメンブランフィルターで濾過滅菌した。添加量は純品換算で示した。濾液10mlを45ml容の試験管に分注し、室温、光照射下で静置して保存した。褐変化(着色度)は、440nmにおける吸光度を経日的に測定し、調製直後の吸光度との差を吸光度変化として示した。表6に保存7日、14日、21日目の吸光度変化を5連の平均値で示した。
【0033】
【表6】
Figure 0004287583
【0034】
表6に示すとおり、AFによりハーブ茶の褐変が抑制された。AFとエリソルビン酸ナトリウムを併用することにより色調の安定化に優れていた。
【0035】
【発明の効果】
本発明によれば、光照射下においても色調の安定な緑茶飲料を提供することができる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to color stable green tea beverages, and more particularly to color stable green tea beverage containing 1, 5-D-anhydrofructose.
[0002]
[Prior art]
Tea-based beverages have a unique color tone depending on the type of tea, and this color tone appeals to consumers' preferences, and changes in color tone such as discoloration affect their commercial value. Conventionally, tea-based beverages have been mainly used in drinking-out cans, but in recent years, consumption has expanded to include plastic bottles that can be left undrinked for the convenience of consumers. In the case of cans, the change in the color tone of tea due to the effect of light did not become a problem, but as the consumption of plastic bottles expanded, the change in color tone due to the effect of light became a problem. Conventionally, addition of vitamin C or a sodium salt thereof to tea-based beverages has been performed, and although there is some effect in stabilizing the color tone under light irradiation, it has been insufficient. In order to reduce the influence of light, green PET bottles have also been used, but the effect of stabilizing the color tone is still insufficient.
[0003]
[Problems to be solved by the invention]
Therefore, an object of the present invention is to provide a green tea beverage having a stable color tone even under light irradiation.
[0004]
[Means for Solving the Problems]
As a result of intensive studies to solve the above problems, the present inventors have found that 1,5-D-anhydrofructose is effective in stabilizing the color tone of a green tea beverage, and have reached the present invention.
[0005]
That is, the present invention provides a green tea beverage having a stable color tone characterized by containing 1,5-D-anhydrofructose.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The tea of the green tea beverage of the present invention is a green tea packaged in a transparent container in which a change in color tone during distribution and storage becomes a problem .
[0009]
In the present invention, 1,5-D-anhydrofructose (hereinafter abbreviated as AF) used as a color stabilizer is an anhydrous monosaccharide that is a constituent of red algae such as ogonyori, and is extracted from these red algae. Can be used. Alternatively, it can be easily obtained by reacting starch with amylase to form dextrin and then reacting with an enzyme (α-1,4-glucan lyase). The starch may be potato or corn and is not particularly limited. Amylase is commercially available, for example, Amano Pharmaceutical Co., Ltd. An enzyme that generates AF from dextrin can be extracted from red algae such as ogonori and used. The obtained AF may be used crude or purified.
[0010]
By adding AF to the green tea beverage, the color tone of the green tea beverage can be stabilized. In particular, the effect of improving the light resistance of the green tea pigment is obtained.
[0011]
The AF is preferably added at a concentration of 0.01 to 10% by weight with respect to the green tea beverage leached to a normal concentration. If the AF content is less than 0.01%, the effect of stabilizing the color tone is insufficient. On the other hand, if it exceeds 10%, the bitter taste of AF is felt, which is not preferable. A more preferable content is 0.03 to 3%.
[0012]
A color stable green tea beverage of the present invention, vitamin C is water-soluble antioxidants, it can be used in combination with erythorbic acid or sodium salt thereof, Ri by the combinations of these, and et color tone stable green tea beverage Can be obtained. In this case, the amount of these compounds added is 0.01 to 1% by weight.
[0013]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto. In the examples, AF used was Nippon Starch Co., Ltd., solid content 70.5%, AF purity 41.2%.
[0014]
Example 1
8 g of Tadashi of soup stock Sencha (manufactured by Matsui Seisaku Co., Ltd.) was immersed in 1 liter of sterilized water cooled after autoclaving and extracted overnight in a refrigerator. AF and vitamin C were added to the extract at concentrations shown in the test section of Table 1, and then sterilized by filtration through a 0.45 μm membrane filter. The amount added was shown in terms of pure product. 10 ml of the filtrate was dispensed into a 45 ml test tube and stored at room temperature under light irradiation. As for browning change (coloring degree), the absorbance at 440 nm was measured over time, and the difference from the absorbance immediately after preparation was shown as the absorbance change. Table 1 shows the change in absorbance on the 7th, 14th, and 21st days of storage as an average of 5 consecutive values.
[0015]
The taste and aroma immediately after the preparation of sencha in the test group to which AF or AF and vitamin C were added were not different from those of the extract solution to which these were not added (hereinafter referred to as the control group). No adverse effect was observed.
[0016]
[Table 1]
Figure 0004287583
[0017]
As shown in Table 1, browning of green tea was suppressed by the addition of AF. Moreover, the combined use effect of AF and vitamin C was recognized.
[0018]
Example 2
8 g of Tadashi of soup stock Sencha (manufactured by Matsui Seisaku Co., Ltd.) was immersed in 1 liter of sterilized water cooled after autoclaving and extracted overnight in a refrigerator. AF and erythorbic acid were added to the extract at the concentrations shown in the test section of Table 1, and then sterilized by filtration through a 0.45 μm membrane filter. The amount added was shown in terms of pure product. 10 ml of the filtrate was dispensed into a 45 ml test tube and stored at room temperature under light irradiation. As for browning change (coloring degree), the absorbance at 440 nm was measured over time, and the difference from the absorbance immediately after preparation was shown as the absorbance change. Table 2 shows the change in absorbance on the 7th, 14th, and 21st days of storage as an average of 5 consecutive values.
[0019]
The taste and aroma immediately after the preparation of the sencha in the test group to which AF or AF and erythorbic acid were added were not different from the control group, and no adverse effects on the quality due to the addition of the color stabilizer were observed.
[0020]
[Table 2]
Figure 0004287583
[0021]
As shown in Table 2, browning of green tea was suppressed by the addition of AF. Moreover, the combined use effect of AF and erythorbic acid was recognized.
[0022]
Reference example 1
Four tea bags (1.8 g) of commercially available black tea “Lipton Brisk Teeback” (Lipton Japan Co., Ltd.) were extracted in 600 ml of hot water for 2 minutes. The extract was centrifuged at 10,000 × g for 30 minutes. AF and vitamin C sodium salt (sodium ascorbate) were added to the extract at concentrations shown in the test section of Table 3 , and then sterilized by filtration through a 0.45 μm membrane filter. The amount added was shown in terms of pure product. 10 ml of the filtrate was dispensed into a 45 ml test tube and stored at room temperature under light irradiation. As for browning change (coloring degree), the absorbance at 440 nm was measured over time, and the difference from the absorbance immediately after preparation was shown as the absorbance change. Table 3 shows the change in absorbance on the 7th, 14th, and 21st days of storage as an average of five consecutive values.
[0023]
The taste and aroma immediately after the preparation of the black tea in the test group to which AF or AF and sodium ascorbate were added were not different from those of the control group, and no adverse effects on the quality due to the addition of the color stabilizer were observed.
[0024]
[Table 3]
Figure 0004287583
[0025]
As shown in Table 3, in the case of black tea, the addition of sodium ascorbate significantly promoted the discoloration. On the other hand, in the case of AF, there was almost no initial discoloration, and it was excellent in the stabilization of the color tone of suppressing subsequent browning.
[0026]
Reference example 2
Prepare a 0.4% aqueous solution of oolong tea extract “San Oolong” (manufactured by Suntory Ltd.), add AF and vitamin C at the concentrations shown in the test section of Table 4, and sterilize by filtration through a 0.45 μm membrane filter. did. The amount added was shown in terms of pure product. 10 ml of the filtrate was dispensed into a 45 ml test tube and stored at room temperature under light irradiation. As for browning change (coloring degree), the absorbance at 440 nm was measured over time, and the difference from the absorbance immediately after preparation was shown as the absorbance change. Table 4 shows the change in absorbance on the 7th, 14th, and 21st days of storage as an average value of 5 replicates.
[0027]
[Table 4]
Figure 0004287583
[0028]
As shown in Table 4, in the case of oolong tea, the addition of vitamin C promoted the discoloration. On the other hand, AF has the effect of suppressing browning. Moreover, it was excellent in stabilization of the color tone by using AF and vitamin C together.
[0029]
Reference example 3
8 g of mate tea powder was added to 1 liter of sterilized water cooled after autoclaving, and extracted overnight in a refrigerator. AF and vitamin C were added at the concentrations shown in the test section of Table 5, and then sterilized by filtration through a 0.45 μm membrane filter. The amount added was shown in terms of pure product. 10 ml of the filtrate was dispensed into a 45 ml test tube and stored at room temperature under light irradiation. As for browning change (coloring degree), the absorbance at 440 nm was measured over time, and the difference from the absorbance immediately after preparation was shown as the absorbance change. Table 5 shows the change in absorbance on the 7th, 14th, and 21st days of storage as an average of 5 consecutive values.
[0030]
[Table 5]
Figure 0004287583
[0031]
As shown in Table 5, the browning of mate tea was suppressed by AF. By using AF and vitamin C in combination, the color tone was excellent.
[0032]
Reference example 4
8 g of dried herb (lemonbaum) leaves were added to 1 liter of sterilized water cooled after autoclaving and extracted overnight in a refrigerator. AF and sodium erythorbate were added at the concentrations shown in the test section of Table 6, and then sterilized by filtration through a 0.45 μm membrane filter. The amount added was shown in terms of pure product. 10 ml of the filtrate was dispensed into a 45 ml test tube and stored at room temperature under light irradiation. As for browning change (coloring degree), the absorbance at 440 nm was measured over time, and the difference from the absorbance immediately after preparation was shown as the absorbance change. Table 6 shows the change in absorbance on the 7th, 14th, and 21st days of storage as an average value of 5 replicates.
[0033]
[Table 6]
Figure 0004287583
[0034]
As shown in Table 6, the browning of the herbal tea was suppressed by AF. By using AF and sodium erythorbate in combination, the color tone was excellent.
[0035]
【The invention's effect】
According to the present invention, a green tea beverage having a stable color tone even under light irradiation can be provided.

Claims (2)

1,5−D−アンヒドロフルクトースを含有することを特徴とする色調安定な緑茶飲料。A green tea beverage having a stable color tone, comprising 1,5-D-anhydrofructose. ビタミンCもしくはそのナトリウム塩またはエリソルビン酸もしくはそのナトリウム塩をさらに含有する請求項1記載の色調安定な緑茶飲料。The color-stable green tea beverage according to claim 1, further comprising vitamin C or a sodium salt thereof or erythorbic acid or a sodium salt thereof.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003327861A (en) * 2002-05-14 2003-11-19 Asama Chemical Co Ltd Pigment-stabilizing agent and pigment-stabilizing method
CN104039165A (en) * 2012-01-31 2014-09-10 株式会社明治 Food/beverage in transparent container, and method for inhibiting flavor degradation
WO2014136797A1 (en) 2013-03-04 2014-09-12 サントリー食品インターナショナル株式会社 Light-coloured tea beverage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007091644A (en) * 2005-09-29 2007-04-12 Nihon Starch Co Ltd Immunosuppressant and antiallergic agent

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003327861A (en) * 2002-05-14 2003-11-19 Asama Chemical Co Ltd Pigment-stabilizing agent and pigment-stabilizing method
CN104039165A (en) * 2012-01-31 2014-09-10 株式会社明治 Food/beverage in transparent container, and method for inhibiting flavor degradation
WO2014136797A1 (en) 2013-03-04 2014-09-12 サントリー食品インターナショナル株式会社 Light-coloured tea beverage

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