ZHANG Le,ZHAO Wen-wen,LIAO Jin-lin,et al.Study on Residue of Metribuzin in Summer Soybean Based on QuEChERS-HPLC-MS[J].Soybean Science,2021,40(03):403-411.[doi:10.11861/j.issn.1000-9841.2021.03.0403]
基于QuEChERS-HPLC-MS方法的夏大豆中嗪草酮残留研究
- Title:
- Study on Residue of Metribuzin in Summer Soybean Based on QuEChERS-HPLC-MS
- 关键词:
- 嗪草酮; 夏大豆; QuEChERS; 高效液相色谱-串联质谱法; 稳定性
- Keywords:
- Metribuzin; Summer soybean; QuEChERS; HPLC-MS; Stability
- 文献标志码:
- A
- 摘要:
- 为高效分析嗪草酮在夏大豆青豆(带荚)、青豆秸秆、大豆、大豆秸秆中的残留安全性,本研究建立了QuEChERS样品前处理-高效液相色谱串联质谱法,评价70%嗪草酮水分散粒剂在夏大豆上一年六地残留的安全性。夏大豆青豆(带荚)、青豆秸秆、大豆、大豆秸秆经QuEChERS前处理技术同步实现乙腈提取,PSA和C18净化,再经质谱多反应监测模式扫描,基质匹配标准曲线外标法定量。结果显示:嗪草酮浓度在0.01~0.20 mg?L-1时具有良好的线性关系(r=0.999 7),0.01,0.05和0.20 mg?kg-1加标浓度下,嗪草酮在青豆(带荚)、青豆秸秆、大豆、大豆秸秆中的平均回收率为96.3% ~101.7%,相对标准偏差为1.1%~5.2%,定量下限为 0.01 mg?kg-1。该检测方法简单、快速、灵敏度及准确度高,能够满足夏大豆中嗪草酮残留量的检测要求。对青豆(带荚)、青豆秸秆、大豆、大豆秸秆中的最终残留量进行分析,残留量均小于0.010 mg?kg-1,均低于我国规定的大豆中嗪草酮的MRL值0.05 mg?kg-1。
- Abstract:
- In order to effectively analyze the residue safety of metribuzin in summer soybean(with pod) , green bean straw, soybean and soybean straw, this study established a QuEChERS sample pretreatment coupled with High Performance Liquid Chromatography-tandem Mass Spectrometry (HPLC-MS), to evaluate the residual safety of 70% metribuzin water dispersible granule in summer soybeans sampled from six areas in one year. The extraction of metribuzin from summer soybean green beans(with pod), green bean straw, soybean and soybean straw were extracted by QuEChERS pretreatment technology with acetonitrile, purified by PSA and C18 simultaneously, then scanned by MS spectrometry multi-reaction monitoring mode, and quantified by matrix matching standard curve external standard method. Metribuzin in 0.01-0.20 mg?L-1 range has a good linear relationship, the correlation coefficient was 0.999 7, the standard addition concentrations were 0.01, 0.05 and 0.20 mg?kg-1 , the average recovery of metribuzin in green bean (with pod), green beans straw, soybean and soybean straw was 96.3%-101.7%, the relation standard deviation (RSD) was 1.1%-5.2%, and the quantitative limit was 0.01 mg?kg-1. This method is simple, rapid, sensitive and accurate, meeting to the requirement of detecting the residual quantity of metribuzin in summer soybean. The final residues of 70% metribuzin water dispersible granule in green beans(with pod), green beans straw, soybean and soybean straw were all less than 0.010 mg?kg-1, which were lower than the MRL value of 0.05 mg?kg-1 metribuzin in soybean stipulated by China.
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备注/Memo
收稿日期:2021-01-12