草莓中农药残留及重金属污染状况研究

Study on pesticide residues and heavy metal contamination in strawberries

为了了解某地草莓中农药残留和重金属污染情况,采用液相色谱-串联质谱法、气相色谱-质谱联用法、液相色谱-柱后衍生法、电感耦合等离子体质谱法及原子吸收光谱法分析草莓中农药残留及重金属污染状况。结果表明,33种农药残留和5种重金属,在标准曲线内呈现良好的线性关系,精密度按照相关标准开展试验。在检测的36批次草莓中,其中有8批次草莓检出农药残留,占比为22.22%,有18批次草莓检出重金属,占比为50.00%,其中,4类农残检出率较高,2类重金属检出较高,但所测样品中农药残留及重金属含量均未超标,检出项目的食品安全指数均小于1。

In order to understand the situation of pesticide residues and heavy metal contamination in strawberries,liquid chromatography-tandem mass spectrometry,gas chromatography-mass spectrometry,liquid chromatography-post column derivatization,inductively coupled plasma-mass spectrometry,and atomic absorption spectrometry were adopted for the analysis.The results showed that the 33 pesticide residues and 5 heavy metals showed a good linear relationship in the standard curve,and the precision was tested according to relevant standards.Among the 36 batches of strawberries tested,pesticide residues were detected in 8 batches,accounting for 22.22%;heavy metals were detected in 18 batches,accounting for 50.00%.The detection rate of 4 kinds of pesticide residues and 2 kinds of heavy metals was high.However,the pesticide residues and heavy metals in the tested samples did not exceed the standard,and the food safety indexes of the detected items were all less than 1.