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Effects of roasting treatment on non‐volatile compounds and taste of green tea
Author(s) -
Mao Ajing,
Su Huan,
Fang Shimao,
Chen Xu,
Ning Jingming,
Ho Chitang,
Wan Xiaochun
Publication year - 2018
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1111/ijfs.13853
Subject(s) - roasting , chemistry , sweetness , umami , food science , taste , polyphenol , caffeine , sugar , organoleptic , green tea , organic chemistry , antioxidant , medicine , endocrinology
Summary The effects of roasting treatment on sensory quality and related compounds in green tea were investigated. The combined application of roasting temperature and time 100 °C for 90 min, 120 °C for 60 min and 140 °C for 30 min achieved the most satisfying sensory quality. The HPLC analysis showed that the contents of cis ‐catechins, bitter and umami amino acids reduced with increase in temperature, while the contents of trans ‐catechins and soluble sugar increased with the temperature rise. The content of caffeine and sweet amino acids did not change significantly compared with untreated tea sample. The decrease in cis‐ catechins, total polyphenols and bitter amino acids reduced the bitterness and astringency of the green tea, while the increase in total soluble sugars improved the sweetness and mellow taste. The sensory evaluation results showed that the sensory quality of the tea was significantly enhanced through roasting treatment.