Zhang Shuiba, Yi Jun, Ye Jianglei, Zheng Wenhui, Cai Xueqin, Gong Zhenbin
College of Oceanography & Environmental Science, Xiamen University, Xiamen 361005, China.
Se Pu. 2004 Mar;22(2):154-7.
A method has been developed for the simultaneous determination of buprofezin, methamidophos, acephate and triazophos residues in Chinese tea samples. The pesticide residues were extracted from tea samples with a mixture of ethyl acetate and n-hexane (50:50, v/v) at 45 degrees C. The extracts were subsequently treated with a column packed with 40 mg of active carbon by gradient elution with ethyl acetate and n-hexane. Buprofenzin and the three organophosphorus pesticides were analyzed by gas chromatography using a DB-210 capillary column and a nitrogen-phosphorus detector. The recoveries for spiked standards were 73.4%-96.9%. The relative standard deviations were all within 4.63%. The limits of quantitation (3sigma) in the tea samples were about 7.0-12.0 microg/kg.
已开发出一种同时测定中国茶叶样品中噻嗪酮、甲胺磷、乙酰甲胺磷和三唑磷残留量的方法。在45℃下，用乙酸乙酯和正己烷（50:50，v/v）的混合溶液从茶叶样品中提取农药残留。提取物随后用填充有40mg活性炭的柱进行处理，通过用乙酸乙酯和正己烷梯度洗脱。噻嗪酮和三种有机磷农药采用DB - 210毛细管柱和氮磷检测器通过气相色谱法进行分析。加标标准品的回收率为73.4% - 96.9%。相对标准偏差均在4.63%以内。茶叶样品中的定量限（3σ）约为7.0 - 12.0μg/kg。
