本研究選市售二十六種茶，分析其重金屬含量，茶葉分為發酵，半發酵，全發酵、花草及其他等五類，試樣前處理方法採用，王水消化、微波消化及浸泡液等三種前處理方法並比較彼等之差異，消化液以感應耦合電漿放射光譜儀（Inductively Coupled Plasma Optical Emission Spectrometry ; ICP-OES）分析其重金屬(Zn、Ni、Cd、Mn、Pb、Cu、Co及Cr等)含量，進而比較其溶出量。
樣品分析Zn、Ni、Cd、Mn、Pb、Cu、Co及Cr等重金屬元素，王水消化前處理過後的樣品分析結果濃度範圍為: Zn: 8.2 ~ 53.3ppm、Ni: N.D ~ 16.5 ppm、Mn: 45.7 ~ 1403 ppm、Cu: N.D ~ 22.9 ppm及Cr: N.D ~ 5.5 ppm; 另一方微波消化前處理過後的樣品分析結果，其濃度範圍: Zn: 10.5 ~ 58.8 ppm、Ni: N.D ~ 16.6 ppm、Mn: 47.4 ~ 1492 ppm、Cu: N.D ~ 23.2 ppm及Cr: N.D ~ 6.4 ppm; 浸泡液分析結果，其濃度範圍: Zn: 4.0 ~ 29.9 ppm、Ni: N.D ~ 15.7 ppm及Mn: 24.9 ~ 958 ppm等
在兩種消化法中，鎘、鉛及鈷未被偵測到，而其他金屬在溶於浸泡液後，銅與鉻未被偵測到。

According to the market selling twenty-six kinds of tea through the aqua regia digestion , microwave digestion and infusion pretreatment . The tea was classified as five categories: non-fermented tea, partially fermented tea, completely fermented tea, Herbal tea and others.the metal contents (Zn , Ni , Cd , Mn , Pb , Cu , Co and Cr) of tea prepared solution were analyzed by using （Inductively Coupled Plasma Optical Emission Spectrometry) ICP-OES .
The concentration of aqua regia digestion pretreatment sample were in the range of Zn: 8.2 ~ 53.3ppm、Ni: N.D ~ 16.5 ppm、Mn: 45.7 ~ 1403 ppm、Cu: N.D ~ 22.9 ppm and Cr: N.D ~ 5.5 ppm; The concentration of microwave digestion pretreatment sample were in the range of Zn: 10.5 ~ 58.8 ppm、Ni: N.D ~ 16.6 ppm、Mn: 47.4 ~ 1492 ppm、Cu: N.D ~ 23.2 ppm and Cr: N.D ~ 6.4 ppm; The concentration of infusion pretreatment sample were in the range of Zn: 4.0 ~ 29.9 ppm、Ni: N.D ~ 15.7 ppm及Mn: 24.9 ~ 958 ppm.
The metal Cd , Pb and Co was not detected by two digestion pretreatment ,and other metal by infusion extract , Cu and Cr was not detected.

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