Analysis of residues of prometryne and acetochlor in soil–water system by solid-phase extraction and gas chromatography/mass spectrometry

Abstract

A highly sensitive and simple analytical method was developed for analyzing the binary mixed pesticides of prometryne and acetochlor in soil–water system by gas chromatography/mass spectrometry (GC/MS). The sample solution was first purified by C₁₈ solid-phase extraction column, which was leached by acetone. The leachate was enriched to 1.0 mL by pressure blowing concentrator and then analyzed by GC/MS. The linear calibration curves were showed in the range of 1–15 μg/mL with a correlation coefficient of 0.9991. The average recoveries (n = 5) were between 95.3 and 115.7%, with relative standard deviations ranged from 1.71 and 7.95%. The limits of detection of Prometryne/Acetochlor were up to 0.06 and 0.17 μg/mL, respectively. This method provides a reliable approach to examine and evaluate the residues of prometryne and acetochlor in the soil–water system.

Keywords:

• Soil
• Prometryne
• Acetochlor
• Solid-phase extraction
• Gas chromatography-mass spectrometer

Acknowledgments

This study was supported by Program for Innovative Research Team (in Science and Technology) in University of Yunnan Province (IRTSTYN), Green Chemistry and Functional Materials Research for Yunnan Innovation Team (2011HC008).