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Upgrading analytical methodology through comparative study for screening of 267 pesticides/metabolites in five representative matrices using UPLC-MS/MS.
Journal of Chromatography B ( IF 2.8 ) Pub Date : 2020-02-06 , DOI: 10.1016/j.jchromb.2020.122021
Tae-Woong Na 1 , Md Musfiqur Rahman 2 , Sung-Woo Kim 3 , M Ershadul Haque 4 , Jong-Bang Eun 5 , Jae-Han Shim 2
Affiliation  

A comparative study was conducted to replace the traditional screening method (MFDS#83) with the Quick, Easy, Cheap, Effective, Rugged and Safe (QuEChERS) EN method for the determination of 267 pesticides/metabolites/plant activators/growth regulators in five representative crop matrices (mandarin, pepper, potato, rice, and soybean). In the traditional method, samples were extracted with acetonitrile and salt, and purified with a solid-phase extraction cartridge. In the QuEChERS method, the sample extraction was carried out using acetonitrile and a mixture of salts, and purification was performed using dispersive solid phase extraction. The limit of quantification (LOQ) for the MFDS#83 method was 0.0004 mg/kg, whereas for the QuEChERS EN method, the LOQ varied from 0.002 to 0.006 mg/kg for all analytes in various matrices. A six-point matrix-matched calibration curve was prepared for all analytes in five matrices for both methods. Both the MFDS#83 and QuEChERS EN methods provided excellent linearity, with the coefficients of determination (R2) ≥ 0.99 for most of the compounds. In both cases, the method was validated in terms of recovery and repeatability after the fortification of two different concentrations with three replicates for each of the concentrations. The QuEChERS EN method provided better recovery than the MFDS#83 method for all matrices except mandarin.

中文翻译:

通过比较研究升级了分析方法,使用UPLC-MS / MS在五个代表性基质中筛选了267种农药/代谢物。

进行了一项比较研究,以快速,简便,廉价,有效,坚固耐用和安全的(QuEChERS)EN方法代替了传统的筛选方法(MFDS#83),用于测定五种产品中的267种农药/代谢物/植物活化剂/生长调节剂代表性农作物基质(普通话,胡椒,马铃薯,大米和大豆)。在传统方法中,样品用乙腈和盐萃取,并用固相萃取柱纯化。在QuEChERS方法中,使用乙腈和盐的混合物进行样品萃取,并使用分散固相萃取进行纯化。MFDS#83方法的定量限(LOQ)为0.0004 mg / kg,而QuEChERS EN方法的定量限在0.002-0.006 mg / kg之间变化。对于这两种方法,均针对五种基质中的所有分析物制备了六点基质匹配的校准曲线。MFDS#83方法和QuEChERS EN方法均具有出色的线性,大多数化合物的测定系数(R2)≥0.99。在这两种情况下,该方法在强化两个不同浓度后的回收率和可重复性方面均得到验证,每个浓度三个重复。对于除普通话以外的所有基质,QuEChERS EN方法的回收率均优于MFDS#83方法。在强化两个不同浓度后,每种浓度重复三遍,方法的回收率和重复性得到了验证。对于除普通话以外的所有基质,QuEChERS EN方法的回收率均优于MFDS#83方法。在强化两个不同浓度后,每种浓度重复三遍,方法的回收率和重复性得到了验证。对于除普通话以外的所有基质,QuEChERS EN方法的回收率均优于MFDS#83方法。
更新日期:2020-02-06
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