Affiliation:
1. State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, People’s Republic of China
Abstract
AbstractRapid and simple methods for the determination of Jiahuangxianjunzuo (JHXJZ) in paddy water, brown rice, soil and rice straw was developed and validated. This method involved the use of ultrahigh-performance liquid chromatography equipped with photodiode array detector. The most important factor was chromatographic conditions, as identified through an orthogonal experimental design. This method showed good recoveries and precisions, thereby indicating its suitability for monitoring of JHXJZ residues in paddy water, brown rice, soil and rice straw. Furthermore, hydrolysis experiment was conducted in the laboratory under pH = 7 buffer solutions, and its degradation product was identified as 2-(4-fluorophenyl)-5-methoxy-1,3,4-oxadiazole by high-resolution mass spectrometry. JHXJZ has a major degradation pathway in the water which the OH− nucleophilic attack the C5 of 1,3,4-oxadiazole ring. Then it leaves mesyl to form intermediate 5-(4-fluorophenyl)-1,3,4-oxadiazol-2-ol and the intermediate combined with methanol formed the degradation product 2-(4-fluorophenyl)-5-methoxy-1,3,4-oxadiazole by the loss of one H2O.The degradation pathways of JHXJZ under the present indoor simulation conditions were proposed.
Funder
National Key Research Development Program of China
National Natural Science Foundation of China
Publisher
Oxford University Press (OUP)
Subject
General Medicine,Analytical Chemistry
Reference23 articles.
1. Inhibition of tobacco bacterial wilt with sulfone derivatives containing an 1,3,4-oxadiazole moiety;Xu;Journal of Agricultural and Food Chemistry,2012
2. Determination and method validation of the new sulfone fungicide 2-(4-fluorophenyl)-5-methylsulfonyl-1,3, 4-oxadiazole in tomato and soil by UPLC in field trial samples from Guizhou province, China;Linghu;Bulletin of Environmental Contamination and Toxicology,2015
3. The use of solid bonded-phase extraction as alternative to liquid-liquid partitioning for pesticide residue analysis of crops;Odanaka;Fresenius' Journal of Analytical Chemistry,1991
4. Oxadiazon residue concentrations in sediment, fish, and shellfish from a combined residential/agricultural area in Southern California;Crane;Bulletin of Environmental Contamination and Toxicology,1992
5. Determination of oxadiazon residues by headspace solid-phase microextraction and gas chromatography–mass spectrometry;Navalon;Journal of Chromatography A,2002
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