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Int. J. Environ. Res. Public Health 2016, 13(6), 534;

Dissipation and Residues of Dichlorprop-P and Bentazone in Wheat-Field Ecosystem

College of Science, China Agricultural University, Beijing 100193, China
Institute of Plant Protection, Shandong Academy of Agricultural Sciences, Jinan 250100, China
Author to whom correspondence should be addressed.
Academic Editor: Ricardo Bello-Mendoza
Received: 14 April 2016 / Revised: 13 May 2016 / Accepted: 19 May 2016 / Published: 26 May 2016
(This article belongs to the Special Issue Ecological and Human-Health Effects of Pesticides in the Environment)
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Dichlorprop-P and bentazone have been widely used in the prevention and control of weeds in wheat field ecosystems. There is a concern that pesticide residues and metabolites remain on or in the wheat. Thus, the study of the determination and monitoring of their residues in wheat has important significance. A rapid, simple and reliable QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) method was modified, developed and validated for the determination of dichlorprop-P, bentazone and its metabolites (6-hydroxy-bentazone and 8-hydroxy-bentazone) in wheat (wheat plants, wheat straw and grains of wheat) using high-performance liquid chromatography coupled with tandem mass spectrometry (HPLC-MS/MS). The average recoveries of this method ranged from 72.9% to 108.7%, and the limits of quantification (LOQs) were 2.5–12 μg/kg. The dissipation and final residue of four compounds in three provinces (Shandong, Jiangsu and Heilongjiang) in China were studied. The trial results showed that the half-lives of dichlorprop-P and bentazone were 1.9–2.5 days and 0.5–2.4 days in wheat plants, respectively. The terminal residues in grains of wheat and wheat straw at harvest were all much below the maximum residue limit (MRL) of 0.2 mg/kg for dichlorprop-P and 0.1 mg/kg for bentazone established by the European Union (EU, Regulation No. 396/2005). View Full-Text
Keywords: dichlorprop-P; bentazone; dissipation; residue; wheat dichlorprop-P; bentazone; dissipation; residue; wheat

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Feng, X.; Yu, J.; Pan, L.; Song, G.; Zhang, H. Dissipation and Residues of Dichlorprop-P and Bentazone in Wheat-Field Ecosystem. Int. J. Environ. Res. Public Health 2016, 13, 534.

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