Portable battery-powered flow injection analyser for volatile alcohols using semiconductor gas sensors

✍ Scribed by Lucy T. Di Benedetto; Peter W. Alexander; D. Brynn Hibbert

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 419 KB
• Volume: 321
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(95)00564-1

✦ Synopsis

The response characteristics of Taguchi TGSS12 and TGS824 type semiconductor gas seaso~ were evlluated for flow injection ~onitoriktg of alcohol concentrations in liquid samples. The detection method was based on the head space analysis of vapour above aqueous samples containing ethanol. A low cost, hand-held monitor has been developed for this applicntion in which an air carrier stream is pumped through a twin sensor cell. Different sensitivities to aqueous ethanol samples were observed at each sensor. Analysis of commercial liquor samples such as beers, wines and liqueurs showed a correlation coefficient as high as 0.9999 in comparisen with gas chromatography analysis. This system is therefore applicable as a I~rtabie, hand-held flow injection monitor for process control during production and for monitoring the quality of products containing ethanol.