修正因子在有机磷农药残留检测中的应用

Application of correction factor in determination of organophosphorus pesticide residues

建立一种简单、快速、便利、准确、高效的多种农药残留检测方法,探讨用加标回收率校正农药检测结果的不确定度评定。使用DB-1701毛细管柱分离,火焰光度检测器进行检测。结果显示,在苹果作为空白样品的条件下,此方法同时检测12种农药的回收率保持在71.34%~99.23%,相对标准偏差为2.58%~14.08%,此方法能够满足农药残留分析检测质量控制的要求。在置信度为95%时,该研究所用农药的显著性检验结果显示,加标回收率均与1(即加标回收率为100%)存在显著性差异,检测结果需要用修正因子f进行校正。该方法引入修正因子,可为食用农产品的农药残留实践检测过程中运用加标回收率修正检测结果提供理论参考。

To establish a simple,rapid,convenient,accurate,and efficient method for the detection of multiple pesticide residues,the uncertainty evaluation of pesticide detection results corrected by the spiked recovery was discussed.Db-1701 capillary column was used for separation and a flame photometric detector was used for detection.Results showed that the spiked recoveries of 12 pesticides were 71.34%-99.23%with the condition of apple as the blank sample,and the relative standard deviations(RSD)were 2.58%-14.08%.This method could meet the requirements of quality control of pesticide residue analysis and detection.When the confidence was 95%,the significance test results of pesticides used in this test showed that there were significant differences between the spiked recoveries and 1(the spiked recovery iS_(1)00%),and the test results needed to be corrected with the correction factor f.This method introduces a correction factor,which could provide a theoretical reference for the application of spiked recovery rate in the practical detection of pesticide residues in edible agricultural products.