Residues and Dietary Risk Assessment of Prohexadione-Ca and Uniconazole in Oryza sativa L. and Citrus reticulata Blanco by Liquid Chromatography-Tandem Mass Spectrometry

A simple and sensitive method for the simultaneous quantitation of prohexadione-Ca and uniconazole in the field experiment of L. and Blanco was established using solid-phase extraction (SPE) with polymer anion exchange (PAX) and Florisil followed by LC-MS/MS. The method demonstrated excellent linear...

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Veröffentlicht in:Molecules (Basel, Switzerland) Switzerland), 2023-03, Vol.28 (6), p.2611
Hauptverfasser: Ye, Hui, Luo, Yuqin, Li, Yanjie, Wang, Xiangyun, He, Hongmei, Jiang, Jinhua, Yu, Jianzhong, Zhang, Changpeng
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Sprache:eng
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Zusammenfassung:A simple and sensitive method for the simultaneous quantitation of prohexadione-Ca and uniconazole in the field experiment of L. and Blanco was established using solid-phase extraction (SPE) with polymer anion exchange (PAX) and Florisil followed by LC-MS/MS. The method demonstrated excellent linearity (R > 0.999 0), trueness (recoveries between 95~105%), precision (CVs between 0.8~12%), sensitivity, and repeatability (LOQ of 0.05 and 0.01 mg/kg, respectively). Residue tests were conducted in the field at 12 representative sites in China, revealing final concentrations of prohexadione-Ca and uniconazole in brown rice, rice hull, and rice straw to be below 0.05 mg/kg, while in whole citrus fruit and citrus pulp, they were below 0.01 mg/kg. These were below the maximum residue limits specified in China. The chronic dietary risks of prohexadione-Ca and uniconazole in rice crops and citrus fruits were calculated to be 0.48% and 0.91%, respectively. Our research suggests that the chronic risk associated with the daily consumption of rice crops and citrus fruit at the recommended dosage is acceptable.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules28062611