用于检测混合气体中挥发性有机化合物的聚合物涂层石英晶体微天平传感器。

Polymer coated quartz crystal microbalance sensors for detection of volatile organic compounds in gas mixtures.

作者信息

Si Pengchao, Mortensen John, Komolov Alexei, Denborg Jens, Møller Preben Juul

机构信息

Department of Science, Systems and Models, Roskilde University Center, Universitetsvej 1, DK-4000 Roskilde, Denmark.

出版信息

Anal Chim Acta. 2007 Aug 6;597(2):223-30. doi: 10.1016/j.aca.2007.06.050. Epub 2007 Jun 28.

DOI:10.1016/j.aca.2007.06.050

PMID:17683733

Abstract

By coating different conducting polymers of thiophene and its derivatives on quartz crystal microbalance (QCM) sensor surfaces, new novel QCM gas sensors have been produced in two simple ways, which could classify testing gas samples of volatile organic compounds (VOCs) gases. Principle components analysis (PCA) has been performed based on the QCM measurement results, which shows that our QCM sensors array has very good utilizing potential on sensing both polar and low-polar/nonpolar VOC gases. The sensitivity, selectivity, reproducibility and detection limit of QCM sensors have also been discussed. Quantitative variation of sensitivity response with the increasing concentration has been studied. (PLS) analysis and prediction of concentrations of single gas in mixtures have been carried out.

摘要

通过在石英晶体微天平（QCM）传感器表面涂覆噻吩及其衍生物的不同导电聚合物，以两种简单的方式制备了新型的QCM气体传感器，这些传感器可以对挥发性有机化合物（VOCs）气体的测试气体样本进行分类。基于QCM测量结果进行了主成分分析（PCA），结果表明我们的QCM传感器阵列在检测极性和低极性/非极性VOC气体方面具有很好的应用潜力。还讨论了QCM传感器的灵敏度、选择性、重现性和检测限。研究了灵敏度响应随浓度增加的定量变化。进行了偏最小二乘法（PLS）分析和对混合物中单一气体浓度的预测。