Studies on Techniques of Rapid Determining Heavy Metals in Tea-leaves

Abstract

Abstract: The method of rapid determining heavy metals in tea-leaves by HCl-extraction-AAS was studied in this paper. Bythe double factors experiment and orthogonal test, the effects of extraction solvent, time, and temperature on metal recoverieswere investigated in detail to obtain optimum conditions. The results showed that optimum extraction conditions were 70℃,2mol/Lfor 60 min. The percent recovery of cuprum in tea samples was more than 96%, and the percent recovery of lead in teasamples was more than 93%. The analytical results obtained by present method agreed well with the reference results obtainedby traditional methods.

Key words: tea-leave, acid-extracted, heavy metal, rapid determination

YUAN Jian, JU Xing-Rong, WANG Hai-Feng, SHEN Chong-Yu, JIANG Yuan. Studies on Techniques of Rapid Determining Heavy Metals in Tea-leaves[J]. FOOD SCIENCE, 2004, 25(11): 259-263.

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Studies on Techniques of Rapid Determining Heavy Metals in Tea-leaves

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