کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7608811 1493389 2018 20 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Analysis of four sulfonylurea herbicides in cereals using modified Quick, Easy, Cheap, Effective, Rugged, and Safe sample preparation method coupled with liquid chromatography-tandem mass spectrometry
ترجمه فارسی عنوان
تجزیه و تحلیل چهار علف کش های سولفونیل اوره در غلات با استفاده از روش آماده سازی سریع، آسان، ارزان، موثر، ناهموار و ایمن اصلاح شده با طیف سنجی جرم کروماتوگرافی مایع
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
A modified Quick, Easy, Cheap, Effective, Rugged, and Safe (QuEChERS) sample preparation method, coupled with liquid chromatography-electrospray ionization tandem mass spectrometry, has been developed for the simultaneous analysis of four commonly used sulfonylurea herbicides, ethoxysulfuron, halosulfuron-methyl, mesosulfuron-methyl and orthosulfamuron, in rice, maize, wheat and soybean. Adsorption of the analytes onto the primary-secondary amine used in the clean-up step was avoided by using 1% formic acid in acetonitrile as the extraction solvent to maintain the acidic herbicides in a non-ionized state. Trueness studies were carried out at three levels (2.5, 25 and 250 μg/kg for ethoxysulfuron and 5, 50 and 500 μg/kg for the other three analytes). Promising trueness (70.2%-119.8%) was achieved for all herbicides in all matrices after clean-up, with relative standard deviations (RSDr) < 18.6%. Satisfactory matrix effects (−19.7% to 14.8%) were also obtained. Good linearity of the calibration curves was achieved, with determination coefficients (r) ≥ 0.9956, when the concentration of ethoxysulfuron was in the range 0.5-50 μg/L and that of the other three analytes was in the range 1.0-500 μg/L. The RSDwR for within-laboratory reproducibility was 5.7%. The validated method was successfully used to analyze real samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1537, 16 February 2018, Pages 27-34
نویسندگان
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