頁籤選單縮合
題名 | 利用物化與逐步判別分析鑑別臺灣鐵觀音茶之特性=Characteristics of Taiwan Tiehkuanyin Tea Identified by Physicochemical and Stepwise Discriminant Analyses |
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作者 | 劉士綸; 蔡永生; 陳國任; 區少梅; | 書刊名 | 臺灣茶業研究彙報 |
卷期 | 23 民93.11 |
頁次 | 頁133-144 |
分類號 | 473.4 |
關鍵詞 | 臺灣鐵觀音茶; 主要物化成分; 逐步判別分析; Taiwan Tiehkuanyin Tea; Major physicochemical constituents; Stepwise discriminant analysis; |
語文 | 中文(Chinese) |
中文摘要 | 本試驗以最具臺灣鐵觀音茶代表性的木柵比賽茶為抽樣母群,選取各不同等級之鐵觀音茶計34個樣本,分析其主要物化成分含量與變異,期能找出鐵觀音茶之特色成分以及建立臺灣鐵觀音茶之物化成分基本資料。同時針對不同等級之鐵觀音比賽茶,探討其間物化成分之差異,並且配合逐步判別分析鑑別不同等級之臺灣鐵觀音茶。結果顯示,臺灣鐵觀音茶主要化學成分具有茶湯pH值偏低、游離胺基酸非常少及總酯型兒茶素偏高之特徵,此成為鐵觀音茶主要之特色。不同等級鐵觀音茶之物化成分,雖然多數均具顯著差異,但不同等級間卻無一致性。另以逐步判別分析辨別不同等級鐵觀音茶結果,獲得5個影響力較大的整數,而所得之判別失誤率為11.76%。 |
英文摘要 | A total of 34 Tiehkuanyin tea samples of different grades were selected as materials from the competition of Tiehkuanyin tea in MuCha. The major physicochemical constituents of Tiehkuayin tea samples were analyzed and compared to establish the basic constituent profile of Tiehkuanyin tea produced in Taiwan. Three different grades of Tiehkuanyin tea were used to find out the difference in the physicochemical constituents among them. Stepwise discriminant analysis (SDA) was used to assist in discriminating the three different grades of Tiehkuanyin tea. The results showed that the low pH, very low free amino acids content but high total ester-type catechins content were characteristic of Taiwan Tiehkuanyin tea. Most of the physicochemical constituents among the three grades of Tiehkuanyin tea samples differed significantly, but there were no analogous tendencies among grades. The results of SDA showed that five variables were selected by SDA among three grades of Tiehkuanyin tea samples and the total error percentage was 11.76%. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。