TEA BEVERAGE CONTAINING AMINO ACID AT HIGH CONCENTRATION
Provided is a packaged tea beverage containing amino acids at high concentrations, wherein heat-deterioration odor generated by heat sterilization has been reduced. The contents of amino acids, caffeine and furaneol in the tea beverage are adjusted to at least 40 ppm, at least 150 ppm, and at least 50 ppb, respectively. The catechins content is preferably adjusted to not more than 600 ppm.
1 . A packaged tea beverage produced through heat sterilization, containing:
(a) at least 40 ppm of amino acids,
(b) at least 150 ppm of caffeine, and
(c) at least 50 ppb of furaneol.
2 . The tea beverage according to claim 1 , further containing (d) pyrazines, wherein the proportion of the furaneol to the pyrazines ((c)/(d)) is at least 2.0.
3 . The tea beverage according to claim 1 , wherein catechins are contained at not more than 600 ppm.
4 . The tea beverage according to claim 1 , wherein the furaneol and/or the pyrazines are/is added as an extract from tea leaves.
5 . A process for reducing heat-deterioration odor in a packaged tea beverage containing at least 40 ppm of amino acids and produced through heat sterilization, comprising adjusting the caffeine content in the beverage to at least 150 ppm and the furaneol content in the beverage to at least 50 ppb before the heat sterilization of the beverage.
6 . The tea beverage according to claim 2 , wherein catechins are contained at not more than 600 ppm.
7 . The tea beverage according to claim 2 , wherein the furaneol and/or the pyrazines are/is added as an extract from tea leaves.
8 . The tea beverage according to claim 3 , wherein the furaneol and/or the pyrazines are/is added as an extract from tea leaves.