期刊
REGULATORY TOXICOLOGY AND PHARMACOLOGY
卷 100, 期 -, 页码 72-79出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.yrtph.2018.10.015
关键词
Dimethomorph; Pyraclostrobin; Residue dynamics; Dietary risk assessment; Grape
资金
- National Key Research and Development Program of China [2016YFD0201305, 2016YFD0201306]
- Science and Technology Programs of Guizhou Province [20136024]
The residue behavior and dietary intake risk of two fungicides (dimethomorph and pyraclostrobin) in grape (Vitis vinifera L.) were investigated from field trials. A modified quick, easy, cheap, effective, rugged, and safe method for simultaneously determining dimethomorph and pyraclostrobin residues in grape and soil was established using high performance liquid chromatography tandem mass spectrometry. The average recoveries of dimethomorph and pyraclostrobin in the grape and soil matrices varied from 76.88% to 97.05%, with relative standard deviations of 1.73%-10.38%. The degradation half-lives of dimethomorph and pyraclostrobin were 7.3-12.0 days and 3.6-7.0 days in grape and soil, respectively. The terminal residues of dimethomorph and pyraclostrobin in the two matrices were 0.05-0.87 mg/kg. For dietary exposure risk assessments, all of the hazard quotient and hazard quotient index values were below 100%, which indicated that the suspending agents of dimethomorph and pyraclostrobin were sprayed on grape at the recommended dosages with no significant potential risks for Chinese consumers. This study provides a reference for analytically evaluating residual degradation behavior and dietary intake risk of two fungicides under field conditions.
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