微波萃取-气相色谱法测定土壤中5 种有机磷农药
杨沈丽
河南省周口水文水资源勘测局,河南周口 466000
Determination of 5 organophosphorus pesticides in soil by microwave extraction-gas chromatography
杨沈丽
Zhoukou Hydrological and Water Resources Survey Bureau, Zhoukou 466000, China
摘要: 建立微波萃取-气相色谱法测定土壤中5 种有机磷农药的含量。样品以丙酮-二氯甲烷(1∶1) 为萃取
溶剂,采用硅胶小柱净化,浓缩后经火焰光度检测器检测。5 种有机磷农药的质量浓度在0.010~0.500 μg/mL 范围
内与色谱峰面积呈良好的线性关系,相关系数均大于0.998,方法检出限为2.33~3.66 μg/kg。样品加标回收率为
90%~103%,测定结果的相对标准偏差为1.54%~9.05%(n=6)。该方法操作方便、快速,结果准确、可靠,试剂用量少,
缩短了分析时间,适用于土壤中有机磷农药的测定。
Abstract:A method for the determination of five organophosphorus pesticides in soil by microwave extraction-gas
chromatography was established. The samples were extracted with acetone-dichloromethane(1:1) and purified by silica
gel column. The samples were detected by flame photometric detector after concentration. The mass concentration of five
organophosphorus pesticides in the range of 0.010-0.500 μg/mL had good linear relationships with the chromatographic
peak area, the correlation coefficients were more than 0.998, and the detection limits were 2.33-3.66 μg/kg. The
recoveries were 90%-103%, and the relative standard deviations were 1.54%-9.05%(n=6). The method is simple, rapid,
accurate and reliable, with less reagent consumption and shorter analysis time. It is suitable for the determination of organic
phosphorus pesticides in soil.
关键词:微波萃取;气相色谱法;土壤;有机磷农药
Keywords:microwave extraction; gas chromatography; soil; organophosphorus pesticides
本文引用格式:
杨沈丽. 微波萃取- 气相色谱法测定土壤中5 种有机磷农药[J]. 化学分析计量,2019,28(2):79-82.
YANG S L. Determination of 5 organophosphorus pesticides in soil by microwave extraction-gas chromatography[J]. Chemical analysisand meterage,2019,28(2):79-82.
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