처리 방법에 따른 감잎차 찻물의 품질 특성
Quality Characteristics of Persimmon(Diospyros kaki, Thunb.) Leaf Tea Solution Prepared by Processing Method
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초록
The purpose of this study was to investigate quality characteristics of persimmon (Diospyros kaki, Thunb.)leaf tea solution prepared by different processing methods. The three groups were divided into PTS-C(control ; persimmon leaf tea solution of persimmon leaf tea prepared by general method with different temperatures),PTS-U(persimmon leaf tea solution of persimmon leaf tea prepared by different temperatures and ultrasonic treatment), PTS-F(persimmon leaf tea s olution of persimmon leaf tea prepared by natural fermentation), and then they were analyzed with regard to the content of proximate compositions, Hunter's color value sminerals,tannin, and caffeine. Thep Hvalue of PTS-F(6.82) tea solution was higher than those of theothers. No grea tdifference was shown among all samples in the moisture contents(99.8∼99.9%). In case of Hunter's value,the 'L' and 'a' values of all samples ranged from 61.76 to 63.72 and from 0.86 to 0.92. The levels of heavy metals (As, Pb, Cd, and Hg), Ca, Fe and Zn in all samples were not detected. The highest content of tannin were 68.11 ㎍ /g for PTS-C sample, while the levels of caffeine in all samples were not detected.
Abstract
The purpose of this study was to investigate quality characteristics of persimmon (Diospyros kaki, Thunb.)leaf tea solution prepared by different processing methods. The three groups were divided into PTS-C(control ; persimmon leaf tea solution of persimmon leaf tea prepared by general method with different temperatures),PTS-U(persimmon leaf tea solution of persimmon leaf tea prepared by different temperatures and ultrasonic treatment), PTS-F(persimmon leaf tea s olution of persimmon leaf tea prepared by natural fermentation), and then they were analyzed with regard to the content of proximate compositions, Hunter's color value sminerals,tannin, and caffeine. Thep Hvalue of PTS-F(6.82) tea solution was higher than those of theothers. No grea tdifference was shown among all samples in the moisture contents(99.8∼99.9%). In case of Hunter's value,the 'L' and 'a' values of all samples ranged from 61.76 to 63.72 and from 0.86 to 0.92. The levels of heavy metals (As, Pb, Cd, and Hg), Ca, Fe and Zn in all samples were not detected. The highest content of tannin were 68.11 ㎍ /g for PTS-C sample, while the levels of caffeine in all samples were not detected.
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