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GC-MS Determination of Residual Amounts of 19 Pesticides in Drinking Water with Enrichment by Liquid-Liquid Extraction

Huamei Yang

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Abstract

GC-MS with enrichment by liquid-liquid extraction was applied to the determination of residual amounts of 19 pesticides in drinking water.The pesticides in sample were extracted thrice with dichloromethane (20,10,10 mL),the extracts were combined and evaporated rotationally to 1.0 mL,from which 1.0μL was taken for GC-MS analysis.The HP-5MS capillary column was used for separation,and EI source with SIM mode was used in MS determination.Phenanthrene-d_(10) was added as internal standard,and values of peak area were used in quantification.Linearities for the 19 pesticides were obtained in definite concentration ranges,with values of detection limits(3S/N) ranged from 0.002 to 0.10 mg·L~(-1).Values of recovery found by standard addition method were in the range of 81.1%-103.0%with RSD's(n=6) ranged from 0.25%to 7.7%.

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What this paper is about

GC-MS with enrichment by liquid-liquid extraction was applied to the determination of residual amounts of 19 pesticides in drinking water.The pesticides in sample were extracted thrice with dichloromethane (20,10,10 mL),the extracts were combined and evaporated rotationally to 1.0 mL,from which 1.0μL was taken for GC-MS analysis.The HP-5MS capillary column was used for separation,and EI source with SIM mode was used in MS determination.Phenanthrene-d_(10) was added as internal standard,and values of peak area were used in quantification.Linearities for the 19 pesticides were obtained in definite concentration ranges,with values of detection limits(3S/N) ranged from 0.002 to 0.10 mg·L~(-1).Values of recovery found by standard addition method were in the range of 81.1%-103.0%with RSD's(n=6) ranged from 0.25%to 7.7%.

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Available abstract

GC-MS with enrichment by liquid-liquid extraction was applied to the determination of residual amounts of 19 pesticides in drinking water.The pesticides in sample were extracted thrice with dichloromethane (20,10,10 mL),the extracts were combined and evaporated rotationally to 1.0 mL,from which 1.0μL was taken for GC-MS analysis.The HP-5MS capillary column was used for separation,and EI source with SIM mode was used in MS determination.Phenanthrene-d_(10) was added as internal standard,and values of peak area were used in quantification.Linearities for the 19 pesticides were obtained in definite concentration ranges,with values of detection limits(3S/N) ranged from 0.002 to 0.10 mg·L~(-1).Values of recovery found by standard addition method were in the range of 81.1%-103.0%with RSD's(n=6) ranged from 0.25%to 7.7%.

Key concepts: Chromatography, Dichloromethane, Chemistry, Extraction (chemistry), Pesticide, Internal standard, Detection limit, Sample preparation

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GC-MS Determination of Residual Amounts of 19 Pesticides in Drinking Water with Enrichment by Liquid-Liquid Extraction — Research Paper | ScholarLens