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首页> 外文期刊>The Analyst: The Analytical Journal of the Royal Society of Chemistry: A Monthly International Publication Dealing with All Branches of Analytical Chemistry >Preconcentration and detection of chlorinated organic compounds and benzene
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Preconcentration and detection of chlorinated organic compounds and benzene

机译：氯代有机化合物和苯的预浓缩和检测

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Remote and automated detection of organic compounds in subsurface aquifers is crucial to superfund monitoring and environmental remediation. Current monitoring techniques use expensive laboratory instruments and trained personnel. The use of a filled tubular preconcentrator combined with a chemicapacitive detector array presents an attractive option for the unattended monitoring of these compounds. Five preconcentrator materials were exposed to common target compounds of subsurface remediation projects (1,1,2- trichloroethane, trichloroethylene, t-1,2-dichloroethylene, benzene, and perchloroethylene). Rapid heating of the tube caused the collected, concentrated effluent to pass over the surface of a chemicapacitive detector array coated with four different sorbent polymers. A system containing a porous ladder polymer and the sensor array was subsequently used to sample the analytes injected onto sand in a laboratory test, simulating a subsurface environment. With extended collection times, effective detection limits of 5 ± 3 ppbV for 1,1,2-trichloroethane and 145 ± 60 ppbV for benzene were achieved. Effects of the preconcentrator material structure, the collection time, and sensor material on the system performance were observed. The resultant system presents a solution for remote, periodic monitoring of chlorinated organic compounds and other volatile organic compounds in a soil matrix. This journal is
机译：远程自动检测地下含水层中的有机化合物对于超级资金监测和环境修复至关重要。当前的监视技术使用昂贵的实验室仪器和训练有素的人员。填充的管状预浓缩器与化学容性检测器阵列的组合使用，为无人值守监测这些化合物提供了一个有吸引力的选择。将五种预浓缩器材料暴露于地下修复项目的常见目标化合物（1,1,2-三氯乙烷，三氯乙烯，t-1,2-二氯乙烯，苯和全氯乙烯）。管子的快速加热导致收集的浓缩流出物通过涂有四种不同吸附剂聚合物的化学容性检测器阵列的表面。随后使用包含多孔梯形聚合物和传感器阵列的系统在实验室测试中对注入沙子中的分析物进行采样，以模拟地下环境。随着延长的采集时间，对1,1,2-三氯乙烷的有效检出限达到5±3 ppbV，对苯达到145±60 ppbV。观察了预浓缩器材料结构，收集时间和传感器材料对系统性能的影响。最终的系统提供了一种解决方案，用于远程，定期监测土壤基质中的氯代有机化合物和其他挥发性有机化合物。这本日记是

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