中文摘要：本文介绍了一种采用填料吸附剂的微萃取提取工艺测定甘蔗汁中六种农药（丁噻隆、呋喃丹、莠去津、赛克津、莠灭净、联苯菊酯）残留的检测方法。试验结果表明，定量限为2.0-10.0μg/L，通过加权模型构建的校准曲线降低了绝对残留值总和而且提高了相关系数，本文还应用该方法对巴西圣保罗州不同城市市场的四种甘蔗汁进行了农药残留监测。
外文摘要：This paper describes the development of a method for the determination of six pesticides (tebuthiuron, carbofuran, atrazine, metribuzine, ametryn, and bifenthrin) in sugarcane juice using microextraction by packed sorbent as the extraction technique. The extraction steps were optimized by factorial design, being the variables pH, ionic strength, desorption solvent and solvent volume optimized for comparisons among sorbent materials. Among the evaluated materials C18-Chromabond (R) showed better extraction efficiency. A factorial design 23 with central point was used for the extraction cycles optimization Draw/eject and washes cycles showed significant improvements in the extraction efficiency when the number of cycles increased. The method was validated and showed a limit of quantification in the range of 2.0-10.0 mu g.L-1. The calibration curves were constructed by weighting models that reduced the sum of absolute residues values and improved determination coefficient. The matrix factor and extraction efficiency were 97.3-77.3% and 27.1-64.8%, respectively. The accuracy was 71.7-106.9%; precision evaluated as the coefficient of variance obtained in intra and inter day analysis was 4.5-15.9%. The method was applied to the determination of pesticide residues in four sugarcane juice samples commercially available in markets from different cities from Sao Paulo state, Brazil.
外文关键词：Factorial design, Microextraction by packed sorbent, Pesticide residues, Sugarcane juice, Weighing calibration
作者：Fumes, Bruno Henrique; Andrade, Felipe Nascimento; dos Santos Neto, Alvaro Jose; Lancas, Fernando Mauro
作者单位：Univ Sao Paulo, Inst Chem Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil.
期刊名称：JOURNAL OF SEPARATION SCIENCE
期刊影响因子：2.741
出版年份：2016
出版刊次：7
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