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Acta Chromatographica
Authors: Shuanghu Wang, Zixia Lin, Ke Su, Jing Zhang, Lijing Zhang, Zhimou Gao, Zhiyi Wang, Jianshe Ma, and Xianqin Wang

The rats were randomly divided into paraquat group, curcumin treatment group, and pirfenidone treatment group. The concentration of paraquat in rat plasma was determined by an ultra-performance liquid chromatography–tandem mass spectrometry (UPLC–MS/MS) method over the range of 10–2000 ng mL−1. Chromatographic separation was achieved on a BEH HILIC (2.1 mm × 100 mm, 1.7 μm) column. The mobile phase was consisted of acetonitrile and 10 mm ammonium formate buffer (containing 0.1% formic acid) with gradient elution pumped at a flow rate of 0.4 mL min−1. Protein precipitation with acetonitrile was used as sample preparation. Compared with the paraquat group, there is statistical toxicokinetic difference for curcumin treatment group and pirfenidone treatment group, AUC(0 − t) decreased (P < 0.05), clearance (CL) increased (P < 0.05) for curcumin or pirfenidone treatment group, and Cmax decreased (P < 0.05) for curcumin treatment group. The results showed that treatment by curcumin and pirfenidone could relieve acute paraquat poisoning in rats.

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