使用固相萃取净化和气相色谱法测定低水分、非脂肪产品中的有机氯和有机磷农药残留量。
Determination of organochlorine and organophosphorus pesticide residues in low moisture, nonfatty products using a solid phase extraction cleanup and gas chromatography.
作者信息
Schenck F J, Howard-King V
机构信息
Baltimore District Laboratory, U.S. Food and Drug Administration, Baltimore, MD 21201, USA.
出版信息
J Environ Sci Health B. 2000 Jan;35(1):1-12. doi: 10.1080/03601230009373250.
A multiresidue solid-phase extraction (SPE) method for the isolation and subsequent gas chromatographic determination of organochlorine and organophosphorus pesticide residues in low-moisture, nonfatty products is described. Residues are extracted from samples with an acetonitrile/water mixture. Cleanup of the extract is performed using graphitized carbon black and anion exchange SPE columns, and analysis is performed by gas chromatography with Hall electrolytic conductivity and flame photometric detection. Recovery data was obtained by fortifying corn, oats and wheat with pesticides. The average recoveries were 79-123% for eight organochlorine and 51-122% for 28 organophosphorus pesticide residues. The limit of quantitation for chlorpyriphos was 0.05 ppm using the Hall electrolytic conductivity detector and < 0.005 ppm using the flame photometric detector.
描述了一种多残留固相萃取（SPE）方法，用于分离并随后气相色谱测定低水分、无脂肪产品中的有机氯和有机磷农药残留。用乙腈/水混合物从样品中提取残留。使用石墨化炭黑和阴离子交换SPE柱对提取物进行净化，并通过带有霍尔电解电导检测器和火焰光度检测器的气相色谱进行分析。通过在玉米、燕麦和小麦中添加农药获得回收率数据。8种有机氯农药残留的平均回收率为79 - 123%，28种有机磷农药残留的平均回收率为51 - 122%。使用霍尔电解电导检测器时，毒死蜱的定量限为0.05 ppm，使用火焰光度检测器时定量限<0.005 ppm。
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