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Paclobutrazol Residue Determination in Potato and Soil Using Low Temperature Partition Extraction and Ultrahigh Performance Liquid Chromatography Tandem Mass Spectrometry

文献类型： 外文期刊

作者： Liu, Hongcheng 1 ; Lin, Tao 1 ; Mao, Jia 4 ; Lu, Huan; Yang, Dongshun 1 ; Wang, Jiliang; Li, Qiwan 1 ;

作者机构： 1.Minist Agr, Supervis & Testing Ctr Farm Prod Qual, Kunming, Peoples R China

2.Minist Agr, Lab Qual & Safety Risk Assessment Agroprod, Kunming, Peoples R China

3.Yunnan Acad Agr Sci, Inst Qual Stand & Testing Technol, Kunming 650223, Peoples R China

4.Yunnan Acad Agr Sci, Inst Agr En

期刊名称：JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY （ 影响因子：2.193； 五年影响因子：2.4 ）

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收录情况： SCI

摘要： A simple, accurate, and highly sensitive analytical method was developed for determining the paclobutrazol residue in potato and soil, the dynamics dissipation in soil. Extraction was carried out by low temperature partitioning and analyzed by ultrahigh performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS). For a favor extraction yield, the parameters such as temperature and solvent were optimized. The result showed that sample would be easily frozen and separated using acetonitrile under -20 degrees C for 10 min. The limit of detection (LOD) was 0.5 mu g/kg, and the limit of quantification (LOQ) was 2 and 5 mu g/kg for potato and soil, respectively. The influence of paclobutrazol residue in potato was evaluated. The possible contamination of paclobutrazol from surface can be rinsed by distilled water or peeled off, but the paclobutrazol in potato harvest comes mainly from absorption and transport, which could not be removed by peeling. The half-life of paclobutrazol in soil was 20.64 days, and the residue was below 0.22 mg/kg on 50th day after spraying. According to the risk assessment with Need Maximum Daily Intake (NEDI) and Acceptable Daily Intake (ADI), a Maximum Residue Limit (MRL) of paclobutrazol in potato was recommended as 1.0 mg/kg.

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