顶空气相色谱法测定番茄中甲基异柳磷与甲拌磷残留量

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关键词：番茄；甲基异柳磷；甲拌磷；顶空气相色谱；农药残留分

中图分类号：TS207.3 文献标志码：A 文章编号：1674-0270（2026）01-0097-04

DOI： 10.16043/j.cnki.cfs.2026.01.025

Determination of Methyl Parathion and Phorate Residues in Tomatoes by Headspace Gas Chromatography

LI Jingqia'， SUN Lei ² （1.Suqian CitySucheng DistrictComprehensive InspectionandTesting CenterforAgricultural Products，Suqian2238oo，China; 2.Sucheng District Agricultural Technology Comprehensive Service Center， Suqian 2238O0， China）

Abstract： In response to the need for monitoring organophosphorus pesticide residues in tomatoes，a headspace gas chromatography （HS-GC） method was developed for the simultaneous determination of methyl parathion and phorate residues. By optimizing sample preparation procedures along with headspace incubation temperature，time，and saltingout conditions，eficient enrichmentand separation of the target compounds were achieved.The method exhibites good linearity in the range of 0.01～0.50mg/kg（R2>0.995） ， with limits of detection （LOD） ranging from 0.003 5 to 0.0041mg/kg Spiked recovery rates range from 85.9% to 95.2% ，with relative standard deviations（ SRSD ）below 6% . The method is simpletooperate，demonstrates high stabilityandissuitablefortherapid determinationofmethylparathionandphorate residues in tomato samples.

Key Words： tomato; methyl parathion; phorate; headspace gas chromatography; pesticide residue analysis

有机磷农药在蔬菜生产中应用广泛。（剩余4778字）