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首页> 外文期刊>Separation Science Plus >Development of a sample preparation procedure using an iron‐based metal‐organic framework for the extraction of pesticides from fruit juices by dispersive micro solid‐phase extraction followed by their preconcentration by dispersive liquid‐liquid microextraction
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Development of a sample preparation procedure using an iron‐based metal‐organic framework for the extraction of pesticides from fruit juices by dispersive micro solid‐phase extraction followed by their preconcentration by dispersive liquid‐liquid microextraction

机译：样品制备过程的发展使用基于一个铁的金属有机框架农药的提取果汁分散微固相萃取后应承担的他们的预浓缩分散液体量液相微萃取

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Abstract For the first time, this research aims to develop a MIL‐53 (Fe)‐based dispersive micro solid‐phase extraction method prior to dispersive liquid‐liquid microextraction for the extraction and preconcentration of some pesticides and their analysis using a gas chromatography–flame ionization detector. For performing the extraction procedure, MIL‐53 (Fe) was added to an aqueous solution containing the analytes and vortexed to be dispersed in the solution and adsorb the analytes. After centrifugation, the analytes loaded on the adsorbent were eluted using acetonitrile. Then, μL‐level of carbon tetrachloride, as an extractant, was mixed with the obtained acetonitrile phase and injected into deionized water. One microliter of the sedimented phase after centrifugation was injected into the separation system. Satisfactory analytical results such as wide linear ranges, high enrichment factors (250–380), reasonable extraction recoveries (50–76%), and low limits of detection (0.63–2.05 μg L−1) and quantification (2.11–6.83 μg L−1) were obtained. Using only 5.0 mg MIL‐53 (Fe) as the sorbent, 0.5 mL acetonitrile as the elution/disperser solvent, and 40 μL carbon tetrachloride as the extractant makes the analytical approach so precious. Also, using a green metal, iron, as the central ion of the metal‐organic framework is another beneficial aspect of the research.
机译：文摘首次研究旨在开发一个MIL 53 (Fe)基于色散微固体分散前必经阶段提取方法液液微萃取的萃取和一些农药和预浓缩使用气体chromatography-flame分析电离检测器。提取过程中,密尔53 (Fe)被添加到一个包含分析物和水溶液涡和分散的解决方案分析物吸附。分析物对吸附剂筛选了加载用乙腈。四氯化,作为萃取剂,混合着获得的乙腈阶段和注入去离子水。离心后阶段注入分离系统。结果如宽线性范围,高浓缩因素(250 - 380),合理提取的复苏(50 - 76%),和低的极限检测(0.63 - -2.05μg L−1)和量化(2.11 - -6.83μg L−1)。5.0毫克MIL高53 (Fe)作为吸附剂在0.5毫升乙腈洗脱/分散剂溶剂,和40μL四氯化碳萃取剂如此珍贵的分析方法。用一个绿色的金属、铁、中心离子金属有机框架也是一个有益的方面的研究。

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