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Open Access 12-04-2022 | Original Article

Simultaneous determination of diquat and its two primary metabolites in rat plasma by ultraperformance liquid chromatography–tandem mass spectrometry and its application to the toxicokinetic study

Authors: Zhengsheng Mao, Youjia Yu, Hao Sun, Chao Wu, Qiaoyan Jiang, Chunyan Chu, Chongwen Zhao, Yujie Zhou, Jinsong Zhang, Yue Cao, Feng Chen

Published in: Forensic Toxicology | Issue 2/2022

Abstract

Purpose

This study aimed to develop and validate an ultraperformance liquid chromatography–tandem mass spectrometry to simultaneously determine diquat (DQ) and its two primary metabolites in rat plasma and its application to the toxicokinetic study.

Method

The chromatographic separation of DQ and its two primary metabolites was performed with hydrophilic interaction chromatography column by adding formic acid and ammonium acetate in mobile phase in stepwise elution mode. DQ and its two primary metabolites were detected by liquid chromatography–tandem mass spectrometry in positive mode.

Results

The lower limit of quantification ranging from 0.3 to 3.0 ng/mL for DQ and its two primary metabolites was achieved by using only 50 μL of rat plasma. The maximum concentration (C_max) was 977 ng/mL, half-life (t_1/2) was 13.1 h, and area under the plasma concentration–time curve (AUC_0–t) was 2770 h*ng/mL for DQ, C_max was 47.1 ng/mL, t_1/2 was 25.1 h, and AUC_0–t was 180 h·ng/mL for diquat monopyridone (DQ-M) and C_max was 246 ng/mL, t_1/2 was 8.2 h, and AUC_0–t was 2430 h·ng/mL for diquat dipyridone (DQ-D), respectively.

Conclusions

The validated method was shown to be suitable for simultaneous determination of diquat and its two primary metabolites in rat plasma. This study is the first to study the toxicokinetics of DQ and its two primary metabolites.

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Title: Simultaneous determination of diquat and its two primary metabolites in rat plasma by ultraperformance liquid chromatography–tandem mass spectrometry and its application to the toxicokinetic study
Authors: Zhengsheng Mao
Youjia Yu
Hao Sun
Chao Wu
Qiaoyan Jiang
Chunyan Chu
Chongwen Zhao
Yujie Zhou
Jinsong Zhang
Yue Cao
Feng Chen
Publication date: 12-04-2022
Publisher: Springer Nature Singapore
Published in: Forensic Toxicology / Issue 2/2022
Print ISSN: 1860-8965
Electronic ISSN: 1860-8973
DOI: https://doi.org/10.1007/s11419-022-00623-z

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Simultaneous determination of diquat and its two primary metabolites in rat plasma by ultraperformance liquid chromatography–tandem mass spectrometry and its application to the toxicokinetic study

Abstract

Purpose

Method

Results

Conclusions

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