TITLE

Cloud Point Extraction With Triton X-114 for Separation of Metsulfuron-Methyl, Chlorsulfuron, and Bensulfuron-Methyl From Water, Soil, and Rice and Analysis by High-Performance Liquid Chromatography

AUTHOR(S)
Wu, Yan; Fu, Xu; Yang, Hong
PUB. DATE
October 2011
SOURCE
Archives of Environmental Contamination & Toxicology;Oct2011, Vol. 61 Issue 3, p359
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A new and efficient analytic methodology based on cloud point extraction (CPE) was developed for determination of pesticide residues of metsulfuron-methyl (MSM), chlorsulfuron (CS), and bensulfuron-methyl (BSM) in water, soil, and rice grain by high-performance liquid chromatography (HPLC). Multiple experimental conditions that affected CPE efficiency-including surfactant type and concentration, equilibration temperature and duration, ionic strength, and solution pH were identified. CPE conditions were optimized as follows: 1.5% Triton X-114 (w/v), 12% NaSO (w/v) solution (pH 2.0), and heat-assisted at 50°C for 15 min. The calibration curves for all analytes were linear, ranging from 0.05 to 4.0 mg L, with the correlation coefficients >0.9995 by HPLC-ultraviolet detector and were linear, ranging from 0.004 to 2.0 mg L, with correlation coefficients >0.9983 by CPE-HPLC. The average recoveries at the three spiked levels using CPE ranged from 86.0% to 94.5% for water samples with relative SDs (RSDs) of 0.4% to approximately 7.8%; from 85.6% to 94.8% for soil samples with RSDs of 1.2% to approximately 9.5%; and from 81.9% to 91.3% for rice samples with RSDs of 1.7% to approximately 5.8%. The proposed CPE-HPLC method can be successfully used to analyze MSM, CS, and BSM residues from contaminated water, soil, and rice grain samples.
ACCESSION #
66303636

 

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