1. Analysis of residue dynamics of clofentezine in tangerine and field soil by QuEChERS and HPLC-UV methods
- Author
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Xue-xue Miao, Yunfei Yuan, Yuan-Yuan Yang, Xiao-Yun Yang, Qi-Liang Huang, and Hai Hong
- Subjects
Residue (complex analysis) ,Chromatography ,Uv detector ,Chemistry ,Health, Toxicology and Mutagenesis ,Public Health, Environmental and Occupational Health ,Soil Science ,Quechers ,Pollution ,High-performance liquid chromatography ,Analytical Chemistry ,Linear relationship ,Field soil ,Environmental Chemistry ,Solid phase extraction ,Tangerine Peel ,Waste Management and Disposal ,Water Science and Technology - Abstract
A field experiment was conducted to evaluate clofentezine residue levels and dissipation trend in tangerine and soil for the safe application of clofentezine. A modified QuEChERS-HPLC-UVD method was developed to analyse clofentezine in tangerine and soil. Tangerine samples were homogenised and extracted by acetonitrile and then cleaned up with dispersive solid phase extraction (dSPE) by primary and secondary amine (PSA) and C18. Clofentezine residue was determined by high-performance liquid chromatography (HPLC) with a UV detector (UVD) at the wavelength of 268 nm. The presented method achieved the good linear relationship within the range from 0.05 to 5.0 mg kg−1 for clofentezine (R2 > 0.998). At the fortification levels of 0.05, 0.50 and 1.00 mg kg−1 in tangerine pulp, tangerine peel and soil, recoveries ranged from 75.9% to 117.7% with relative standard deviations (RSD) less than 8.2%. In the supervised field trials, the half-lives of clofentezine in tangerine and soil were approximately 11.3 and 8.6 d...
- Published
- 2014
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