...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Analytica chimica acta >A green and simple sample preparation method to determine pesticides in rice using a combination of SPME and rotating disk sorption devices
【24h】

A green and simple sample preparation method to determine pesticides in rice using a combination of SPME and rotating disk sorption devices

机译：使用SPME和旋转盘吸附装置的组合来确定水稻中农药的绿色和简单的样品制备方法

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this study, a novel environmentally-friendly approach was developed to overcome certain limitations in the analysis of solid food samples. An experimental setup based on solid-phase microextraction apparatus coupled to a rotating disk device is proposed for the determination of polar and slightly-polar pesticides including carbofuran, molinate, atrazine, simazine and tebuconazole in rice samples. In this innovative procedure, a rice sample is inserted into the cavity of the rotating disk device which is then immersed in an aqueous solution followed by high-speed agitation. In this case, water is employed as a green solvent for leaching the analytes from the sample matrix. Simultaneously, a solid-phase micro-extraction fiber comprised of divinylbenzene/carboxen/polydimethylsiloxane (2 cm length and 50/30 mu m film thickness) was immersed in the aqueous solution to extract the slightly polar analytes from the aqueous matrix with subsequent thermal desorption in the injector of a gas chromatograph-mass spectrometer instrument. The optimal extraction conditions were obtained using an extraction temperature of 80 degrees C for 40 min, with 125 mg of rice inserted in the rotating disk. Using the previously optimized extraction conditions, the analytical performance was satisfactory with correlation coefficients higher than 0.9881 for all analytes, limits of detection ranging from 0.46 to 5.9 ng g(-1), limits of quantification from 1.5 to 19.7 ng g(-1), relative recoveries from 76 to 109%, intra-day precision (n = 3) from 1.3 to 19%, and inter-day precision (n = 9) from 3.5 to 6.5%. The proposed method represents a promising alternative for the analysis of complex solid food samples using SPME, since the SPME fiber damage is substantially decreased when the contact with the solid matrix is avoided. (C) 2019 Elsevier B.V. All rights reserved.
机译：在这项研究中，开发了一种新的环保方法，以克服固体食物样品的分析中的某些限制。提出了一种基于连接到旋转盘装置的固相微萃取装置的实验装置，用于测定在水稻样品中包括碳呋喃，熔化剂，亚唑嗪，Simazine和Tebuconazole的极性和略微极性农药。在这种创新过程中，将稻米样品插入旋转盘装置的腔体中，然后浸入水溶液中，然后浸入水溶液中。在这种情况下，用水作为绿色溶剂，用于从样品基质中浸出分析物。同时，将由二乙烯基苯/羧乙烯/聚二甲基硅氧烷（2cm长度和50/30μm膜厚度）组成的固相微萃取纤维浸入水溶液中，以随后热解吸从水性基质中提取略微极性分析物在气相色谱仪质谱仪仪器的注射器中。使用80℃的萃取温度40分钟获得最佳提取条件，其中125mg插入旋转盘中。使用先前优化的提取条件，对所有分析物的相关系数高于0.9881的分析性能，检测限范率为0.46至5.9 ng（-1），从1.5至19.7 ng g的定量限制（-1） ，从76至109％的相对回收，日期综合（n = 3）从1.3〜19％，日内的膳食精度（n = 9），从3.5％到6.5％。所提出的方法代表了使用SPME分析复杂固体食物样品的有希望的替代方案，因为当避免与固体基质接触时，SPME纤维损伤基本上降低。 （c）2019年Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号