Stereoselective Analysis and Degradation of Pyrisoxazole in Cabbage, Pakchoi, and Pepper by Liquid Chromatography Tandem Mass Spectrometry
| Autor: | Hao Xu, Pei Pei Qi, Yuhan Sun, Xiahong Xu, Xue Wei Yang, Xin Quan Wang, Qiang Wang, Lidong Wang, Zhiwei Wang, Xiangyun Wang, Chang Shan Zhao |
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| Rok vydání: | 2017 |
| Předmět: |
0211 other engineering and technologies
Food Contamination Brassica 02 engineering and technology 010501 environmental sciences Quechers 01 natural sciences Tandem Mass Spectrometry Liquid chromatography–mass spectrometry Vegetables Lc ms ms Pepper Chromatography High Pressure Liquid 0105 earth and related environmental sciences 021110 strategic defence & security studies Chromatography Chemistry Stereoisomerism General Chemistry Triazoles Fungicides Industrial Fungicide Degradation (geology) Stereoselectivity Piper nigrum General Agricultural and Biological Sciences Powdery mildew |
| Zdroj: | Journal of Agricultural and Food Chemistry. 65:8295-8301 |
| ISSN: | 1520-5118 0021-8561 |
| DOI: | 10.1021/acs.jafc.7b02877 |
| Popis: | Pyrisoxazole is a chiral fungicide with high sterilizing activity to the plant pathogenic bacteria and thus can be used for protecting the vegetables from gray mold, powdery mildew, and brown rot. The present work aimed to explore its stereoselective degradation in cabbage, pakchoi, and pepper samples. The enantioseparation and analysis on chiral column Lux Cellulose-3 based on liquid chromatography tandem mass spectrometry was developed coupled to the QuEChERS method. The recoveries of the stereoisomers in various vegetables ranged from 72.6 to 124% with RSD lower than 5.0%. Enantioselective dissipation of pyrisoxazole in vegetables displayed that (-)-A-pyrisoxazole was preferentially degraded versus (+)-A-pyrisoxazole in all the vegetables. (+)-B-pyrisoxazole was preferentially degraded in cabbage, while there was no obvious enantioselectivity in pakchoi and pepper. Meanwhile, stereoselectivity analysis demonstrated that (±)-A-pyrisoxazole was degraded faster than (±)-B-pyrisoxazole in pakchoi and pepper, while there was no stereoselective degradation in cabbages. |
| Databáze: | OpenAIRE |
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