溶剂吸收-气相色谱-质谱法测定食用菌中二硫代氨基甲酸酯类农药
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(内蒙古综合疾病预防控制中心,内蒙古 呼和浩特 010031)

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李伟 男 副主任技师 研究方向为食品安全风险监测E-mail:444913651@qq.com 陈志民 男 副主任技师 研究方向为食品安全风险监测与评估 E-mail:haiiang1218@163.com

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Determination of dithiocarbamates pesticide residues in edible fungi by gaschromatography-mass spectrometry with solvent absorption
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(Inner Mongolia Comprehensive Center for Disease Control and Prevention, Inner Mongolia Hohhot 010031, China)

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    摘要:

    目的 建立食用菌中二硫代氨基甲酸酯类农药残留的溶剂吸收-气相色谱-质谱测定方法。方法 样品在氯化亚锡盐酸溶液中加热发生消化反应, 生成二硫化碳,冷却后用正己烷萃取出二硫化碳,经Hp-VOC色谱柱(60 m×0.20 mm,1.12 μm)分离,选择离子监测(SIM)模式气相色谱-质谱进行检测,外标标准曲线法定量。结果 食用菌中添加0.025、0.05、0.25 mg/kg 3个水平的标准溶液,回收率的范围为94.8%~109%,相对标准偏差为3.7%~5.5%(n=3)。检出限为0.01 mg/kg,定量限为0.02 mg/kg。结论 该方法具有操作简单、准确度高和精密度好等优点,可适用于食用菌中二硫代氨基甲酸酯类农药残留的测定。

    Abstract:

    Objective To establish a method for determination of dithiocarbamates (DTCs) pesticide residue in edible fungi by gas chromatography-mass spectrometry (GC-MS) with solvent absorption. Methods DTCs pesticide residues in samples were decomposed to carbon disulfide (CS2) by SnCl2-HCl solution under heating condition, the liberated CS2 was absorbed by hexane and then determined by GC-MS. Results Accuracy and precision were assessed by adding CS2 standard solution in edible fungi at three concentration levels (0.025,0.05 and 0.25 mg/kg).The average spiked recoveries were in the range of 94.8%-109%.The relative standard deviation of precision was from 3.7%-5.5%(n=3). The limits of detection were 0.01 mg/kg and the limits of quantitation were 0.02 mg/kg. Conclusion The method is simple, accurate and reliable. It can be applicable to determination of DTCs pesticide residue in edible fungi.

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李伟,蒲云霞,单美娜,陈志民,刘宇.溶剂吸收-气相色谱-质谱法测定食用菌中二硫代氨基甲酸酯类农药[J].中国食品卫生杂志,2020,32(2):145-149.

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  • 收稿日期:2020-02-29
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  • 在线发布日期: 2020-05-01
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