Dissipation and Residues of Dichlorprop-P and Bentazone in Wheat-Field Ecosystem
| Autor: | Lixiang Pan, Hongyan Zhang, Xiaoxiao Feng, Guochun Song, Jianlei Yu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Dichlorprop
China Maximum Residue Limit 2 4-Dichlorophenoxyacetic acid Health Toxicology and Mutagenesis lcsh:Medicine 010501 environmental sciences Benzothiadiazines Quechers 01 natural sciences Article dichlorprop-P chemistry.chemical_compound Tandem Mass Spectrometry residue wheat bentazone Soil Pollutants media_common.cataloged_instance Ecosystem European union Chromatography High Pressure Liquid Triticum 0105 earth and related environmental sciences media_common Pesticide residue Herbicides lcsh:R 010401 analytical chemistry Public Health Environmental and Occupational Health food and beverages dissipation Straw 0104 chemical sciences chemistry Agronomy 2 4-Dichlorophenoxyacetic Acid Half-Life |
| Zdroj: | International Journal of Environmental Research and Public Health; Volume 13; Issue 6; Pages: 534 International Journal of Environmental Research and Public Health International Journal of Environmental Research and Public Health, Vol 13, Iss 6, p 534 (2016) |
| ISSN: | 1660-4601 |
| DOI: | 10.3390/ijerph13060534 |
| Popis: | 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). |
| Databáze: | OpenAIRE |
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