Abstract
Objectives: To develop gas chromatograph (GC) based chemical agent detector and to compare the response of Surface Acoustic Wave (SAW) detector with Flame Ionization Detector (FID) for the development of a reliable and fast gas/vapour analyzer. Also, to describe the limitations of the FID over SAW detector. Methods: An uncoated 433.92 MHz SAW device was used as Gas Chromatography (GC) detector and its response was recorded and compared with conventional FID detector using short capillary column. The response of both the detectors were analyzed by using standard mixture of seven Volatile Organic Compounds (VOCs). Besides this comparison various key parameter of GC i.e. Flow, temperature and length of GC column were also optimized for fast GC analysis. Findings: After analyzing the fast GC data of both the detectors with same sample, it was observed that the resolution of chromatograms with SAW detector showed more resolved peaks as compare to the FID detector for the same GC parameters. Improvements/Applications: It is concluded that the SAW detector is more suitable for fast and reliable analysis of chemical vapors in rapid analysis. Keywords: Gas chromatograph detector; surface acoustic wave; volatile organic compounds
Highlights
Surface Acoustic Wave (SAW) device was used in 1979 for the first time as gas sensing and in 1964 as detector [1,2]
In order to the detection of Volatile Organic Compounds (VOCs) researchers used many technologies i.e. mass spectroscopy, ion mobile spectroscopy etc. [3,4] Gas chromatograph is one of the best techniques used for the analysis of organic volatile compounds employing various detectors
In order to make the fast analysis researcher optimized the various parameters for development of fast gas chromatography [5,6,7,8,9]
Summary
Surface Acoustic Wave (SAW) device was used in 1979 for the first time as gas sensing and in 1964 as detector [1,2]. In order to the detection of VOCs researchers used many technologies i.e. mass spectroscopy, ion mobile spectroscopy etc. [3,4] Gas chromatograph is one of the best techniques used for the analysis of organic volatile compounds employing various detectors. In order to make the fast analysis researcher optimized the various parameters for development of fast gas chromatography [5,6,7,8,9]. The sensitivity and resolution are the key parameter of any gas sensor system. It becomes of the utmost importance to have a system with the best possible resolution. For the analysis and identification of toxic gases/vapors in field scenario, the
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