Rapid determination of benzidine, picric acid, carbaryl, atrazine, and deltamethrin in surface water by ultra-performance liquid chromatography-tandem mass spectrometry

doi:10.3724/SP.J.1123.2018.04025

Abstract

Abstract:

A method requiring no pre-treatment steps other than filtration, using ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS), has been developed and applied for the rapid determination of benzidine, picric acid, carbaryl, atrazine, and deltamethrin residues in surface water. Water samples were filtered with a 0.2-μ m syringe filter for particle removal and injected directly into the UPLC instrument. The separation was performed on a Waters Acquity UPLC HSS T₃ column utilizing a gradient elution program of methanol (containing 2 mmol/L ammonium acetate) and water (containing 2 mmol/L ammonium acetate) as the mobile phases at a flow rate of 0.4 mL/min. The detection was accomplished by multiple-reaction monitoring scanning in positive/negative ion-switching electrospray ionization mode. Good linearity was observed in the range 0.10-10.0 μ g/L or 1.00-100 μ g/L for different targets with correlation coefficients of 0.996-0.999. The limits of detection (LODs) were 0.01-0.22 μ g/L. The recoveries ranged between 81.4% and 113% at three spiked levels with relative standard deviations (n=6) between 0.84% and 14.0%. The developed method was applied to the analysis of surface waters (river water and reservoir water) from Hangzhou; atrazine and deltamethrin were detected in part of the analyzed samples. This proposed method was characterized by high sensitivity and precision, extensive analytical range, and a high analytical rate, and showed suitability for the analysis of the five named pollutants in surface water.

Key words: atrazine, benzidine, carbaryl, deltamethrin, picric acid, ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS), water

CLC Number:

O658

ZHANG Ming, TANG Fangliang, XU Jianfen, ZHANG Wei, CHENG Xinliang, WANG Liqun. Rapid determination of benzidine, picric acid, carbaryl, atrazine, and deltamethrin in surface water by ultra-performance liquid chromatography-tandem mass spectrometry[J]. Chinese Journal of Chromatography, 2018, 36(9): 866-872.

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