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湖南省市售茶叶中24种农药残留的检测与分析

Residues of 24 Pesticides in Teas Marketed in Hunan Province

  • 摘要: 为了解湖南省市售的茶叶中农药残留的状况,利用气相色谱(GC)对湖南省市售的189份茶叶中24种农药残留情况进行定量检测并对测定结果进行整理和分析。结果显示,189份茶叶样品中有95份被检出有农药残留,检出率50.3%,所有样品均符合国家标准要求,合格率100%;在监测的24种农药残留中,仅检出毒死蜱1项有机磷类农药,而拟除虫菊酯类农药有联苯菊酯、甲氰菊酯、氯氟氰菊酯和高效氯氟氰菊酯3项被检出。检出率分析中,检出率最高的茶叶种类为绿茶,农药种类为氯氟氰菊酯和高效氯氟氰菊酯的检出率最高;检出值分析中,产自福建的茶叶中甲氰菊酯的残留存在超限量值的风险。

     

    Abstract: Level of pesticide residues in tea products marketed in Hunan province was surveyed for food safety concerns. Residues of 24 pesticides in 189 tea samples were determined by means of gas chromatography (GC). Ninety-five, or 50.3%, of the sampled products were found positive with pesticide residues. However, the residue levels were all under the respective MRL set forth for food consumption in the nation. Among the 24 pesticides detected, only one was identified as organophosphorus chlorpyrifos and three as pyrethroids, i.e., bifenthtin, fenpropathrin, and cyhalothrin/beta-cyhalothrin. Among the tea products sampled in this study, the most frequently detected tea type was green tea and the insecticides were cypermethrin and beta-cypermerthrin. The residue of fenpropathrin present in the products imported from Fujian was on the borderline which posed a risk of exceeding the safety limit.

     

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