New methods for the selective detection of hydrogen chloride gas in ambient air in the ppm and ppb concentration range are presented. Triphenylamine and trimethylamine'HCI are the substrates used as coatings. The response times observed using either coatings are less than 30 s. Ammonia and moisture could cause Interference problems using TMA-HCI as the coating material. The application of a gas chromatographic column packed with silica gel eliminates the effect of moisture.
ASJC Scopus subject areas
- Analytical Chemistry