Application of solid-phase extraction: High-resolution mass spectrometry analysis strategy in the characterization and quantification of amide herbicides in aquatic products |
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Authors: | Lei Gao Peng Wang Zhongxiang Chen Qirui Hao Shuyan Bai Ningning Du Chenhui Li Xiaoli Huang Dongli Qin |
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Institution: | 1. Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin, P. R. China;2. Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin, P. R. China
Supervision, Inspection and Testing Center for Fishery Environment and Aquatic Products (Harbin), Ministry of Agriculture and Rural Affairs, Harbin, P. R. China |
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Abstract: | In this study, we developed a new method combining thin-layer ultrasonic extraction, efficient SPE purification, ultra-performance liquid chromatography separation, and high-resolution mass spectrometry characterization for seven amide herbicides in fishery products. In sample preparation, to rapidly increase the contact area between the fish meat and the extractant, the fish meat was smeared on a glass slide. This process resulted in quickly reaching the extraction equilibrium and relatively high extraction efficiency. In data analysis, a strategy for characterization and qualitative analysis was constructed by analyzing the fragmentation of amide herbicides using product ion scans. Isomeric pretilachlor and butachlor were separated chromatographically, while the coeluting isomers, alachlor and acetochlor, could be separated by differences in the fragmentation of their selected precursor ions. This method overcame the challenge of poor dispersion in the extractant caused by the high viscosity of fish meat, and the challenge of separation and characterization for isomers. Compared with other methods, the extraction efficiency was improved and the amide herbicides in aquatic products was characterized and quantified rapidly and accurately. Moreover, the qualitative information was much greater and provided an additional strategy for analytes identification. This rapid and accurate method will benefit workers involved in monitoring fishery. |
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Keywords: | aquatic product quality and safety herbicide high-resolution mass spectrometry solid-phase extraction |
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