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Fast Analysis of Nitrobenzene Compounds in Water by Solid Phase Extraction-Capillary Gas Chromatography

XU Quan-min

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Abstract

A method for the determination of nitrobenzene compounds in water was established by solid phase extraction(SPE)-capillary gas chromatography.The pretreatment of water sample was studied.Conditions of pretreatment of water sample,solid phase extraction and separation by liquid chromatography were tested and optimized.Nitrobenzene in sample was enriched on ODS-C18 column,and separated on DB-17 column(30 m×0.32 mm×0.25 μm) with ECD and FID.The minimal detection concentration was between 0.12～90 μg/L,lower than those of GB13194-91 and GB/T13194-92.The recoveries of the compound were between 81.3% and 117%,relative standard deviation ranged from 0.9% to 5.8%,with accuracy and precision in accordance with the related quality control regulations.Results showed that the method which has advantages over high sensitivity,good selectivity was suitable for determining nitrobenzene compounds in water samples.

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What this paper is about

A method for the determination of nitrobenzene compounds in water was established by solid phase extraction(SPE)-capillary gas chromatography.The pretreatment of water sample was studied.Conditions of pretreatment of water sample,solid phase extraction and separation by liquid chromatography were tested and optimized.Nitrobenzene in sample was enriched on ODS-C18 column,and separated on DB-17 column(30 m×0.32 mm×0.25 μm) with ECD and FID.The minimal detection concentration was between 0.12～90 μg/L,lower than those of GB13194-91 and GB/T13194-92.The recoveries of the compound were between 81.3% and 117%,relative standard deviation ranged from 0.9% to 5.8%,with accuracy and precision in accordance with the related quality control regulations.Results showed that the method which has advantages over high sensitivity,good selectivity was suitable for determining nitrobenzene compounds in water samples.

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Available abstract

A method for the determination of nitrobenzene compounds in water was established by solid phase extraction(SPE)-capillary gas chromatography.The pretreatment of water sample was studied.Conditions of pretreatment of water sample,solid phase extraction and separation by liquid chromatography were tested and optimized.Nitrobenzene in sample was enriched on ODS-C18 column,and separated on DB-17 column(30 m×0.32 mm×0.25 μm) with ECD and FID.The minimal detection concentration was between 0.12～90 μg/L,lower than those of GB13194-91 and GB/T13194-92.The recoveries of the compound were between 81.3% and 117%,relative standard deviation ranged from 0.9% to 5.8%,with accuracy and precision in accordance with the related quality control regulations.Results showed that the method which has advantages over high sensitivity,good selectivity was suitable for determining nitrobenzene compounds in water samples.

Key concepts: Nitrobenzene, Chromatography, Chemistry, Gas chromatography, Solid phase extraction, Extraction (chemistry), Sample preparation, Detection limit

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