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Removal of Matrix Interferences by Nano-MgO and Co-Adsorbents for Accurate Multi-Pesticide Residue Analysis in the Chinese Medicinal Herb, Paeoniae Radix Alba
Journal of Analytical Methods in Chemistry ( IF 2.6 ) Pub Date : 2021-02-05 , DOI: 10.1155/2021/6626257
Chunyu Wang 1 , Xinquan Wang 2, 3, 4 , Jiao Wang 2, 3, 4 , Shanshan Di 2, 3, 4 , Zhiwei Wang 2, 3, 4 , Hao Xu 2, 3, 4 , Huiyu Zhao 2, 3, 4 , Changshan Zhao 1 , Peipei Qi 2, 3, 4
Affiliation  

A simple, accurate, and high-throughput analytical method was developed to detect 123 pesticide residues in Chinese medicinal herb Paeoniae Radix Alba (PRA) by introducing nano-MgO as a highly efficient purification material based on quick, easy, cheap, effective, rugged, and safe (QuEChERS) design concept. Various PRA samples were extracted using 8 mL 0.5% acetic acid-acetonitrile solution and purified by a dispersive solid-phase extraction method with 30 mg nano-MgO, 40 mg primary secondary amine (PSA), and 40 mg octadecylsilane (C18) as the cleanup adsorbents, followed by liquid chromatography-tandem mass spectrometry (LC-MS/MS). 70.7% of pesticides showed a weak matrix effect after the purification process, indicating that this method can give the precise quantitative analysis of trace pesticides residue. The method was systematically validated under optimal conditions in five different kinds of PRA samples; good linearity was observed in the concentration range of 0.5–250 μg/L or 1–250 μg/L. Pesticide recovery in each sample spiked at concentrations of 20, 50, and 200 μg/kg ranged from 98.0% to 111% and the mean relative standard deviation ranged from 2.72% to 5.70%. Furthermore, the method comparison with the traditional QuEChERS method suggested the feasibility, advantages, and potential application prospect of the present method for the multi-pesticide residue analysis in various PRA samples.

中文翻译:

纳米MgO和助吸附剂消除基质干扰物,以准确地分析中草药Pa药Rad(Paeoniae Radix Alba)中的多种农药残留

建立了一种简单,准确,高通量的分析方法,可检测中草药e丹参中的123种农药残留(PRA)通过基于快速,简便,廉价,有效,坚固和安全(QuEChERS)设计概念引入纳米MgO作为高效净化材料。使用8 mL 0.5%乙酸-乙腈溶液萃取各种PRA样品,并通过分散固相萃取方法进行纯化,以30 mg纳米MgO,40 mg伯仲胺(PSA)和40 mg十八烷基硅烷(C18)作为清除吸附剂,然后进行液相色谱-串联质谱(LC-MS / MS)。70.7%的农药在纯化后表现出较弱的基质作用,表明该方法可以对痕量农药残留进行精确定量分析。在最佳条件下对五种不同PRA样品进行了系统验证。在0.5–250的浓度范围内观察到良好的线性 μ g / L的或1-250  μ克/升。每个样品中农药掺入回收在20浓度,50%,和200  μ克/千克范围从98.0%至111%,平均相对标准偏差的范围为2.72%至5.70%。此外,该方法与传统QuEChERS方法的比较表明,本方法用于各种PRA样品中多种农药残留分析的可行性,优势和潜在的应用前景。
更新日期:2021-02-05
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