蔬菜和水果中残留硫双威的气相色谱分析
CLEANUP AND DETERMINATION METHOD FOR THE RESIDUE ANALYSIS OF THIODICARB IN VEGETABLES AND FRUITS BY GC-FPD
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摘要: 本文提出了一种快速、高效提取净化蔬菜、水果中残留硫双威的前处理方法和用火焰光度检测的气相色谱法 该法的最低检出浓度为0.04mg·kg-1,在蔬菜、水果中的平均加标回收率分别为93.0-106.7%和94.5-104.2%,变异系数分别为2.57-6.05%和2.74-5.83%Abstract: A quick and effective liquid-liquid extraction and cleanup method has been developed for the gas chromatographic determination of Thiodicarb in vegetables and fruits.The samples were extracted by methylene chloride.Rotary evaporated all methylene chloride.Quantitatively transfered extracts with a aqueous solution contained 28% alcohol.The water phase was extracted by petroleum ether.Discarded all petroleum ether phase, extracted and diluted with methenyl chloride.The residues were detected by GC-FPD.The minimum detective concentration of Thiodicarb in vegetables and fruits was 0.04 mg·kg-1.The average recoveries of Thiodicarb in vegetables and fruits were in the range of 93.0-106.7% and 94.5-104.2%, respectively.The coefficients of variation were in the range of 2.57-6- 05% and 2.74-5.83%, respectively.
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Key words:
- Thiodicarb /
- gas chromatography /
- multiresidue /
- liquid-liquid extraction /
- vegetable /
- fruit
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