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首頁 /  茶文化 /  茶與文學 /  茶葉中八氯二丙醚(S-421)的檢測及污染來源研究

茶葉中八氯二丙醚(S-421)的檢測及污染來源研究

建立了茶葉中S-421殘留的檢測方法,并明確了茶葉中S-421的污染來源。茶葉樣品用正己烷-丙酮(22:3,V/V)提取,經硅藻土545~濃硫酸(1g+0.4m1)凈化,以正己烷洗脫,GC—ECD檢測,外標法定量。在0.01~1.00mg/kg的添加水平下,平均回收率在93.0%-96.6%之間,相對標準偏差在1.70%~4.05%之間,方法的定量限為0.01mg/kg。該方法的靈敏度、準確度和精密度均符合農藥殘留測定的技術要求。
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