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Issue 5, 1992
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Denuder tube preconcentration and detection of gaseous ammonia using a coated quartz piezoelectric crystal

Abstract

The feasibility of using a cylindrical denuder tube for sampling gaseous ammonia, followed by detection with a piezoelectric quartz crystal, was investigated. Gaseous ammonia was sampled with a tungsten oxide-coated cylindrical denuder tube and then thermally desorbed onto a piezoelectric quartz crystal coated with pyridoxine hydrochloride–Antarox CO-880. A linear calibration graph of peak area response versus ammonia concentration sampled was obtained for ammonia concentrations between 3.1 and 8.2 µg l–1. A concentration of 29 ng l–1 of ammonia in air was detected with a signal-to-background ratio of 14:1 by achieving an enrichment ratio of 900 with the tungsten oxide denuder tube.

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Article information


Analyst, 1992,117, 899-903
Article type
Paper

Denuder tube preconcentration and detection of gaseous ammonia using a coated quartz piezoelectric crystal

Z. Ali, C. L. P. Thomas, J. F. Alder and G. B. Marshall, Analyst, 1992, 117, 899
DOI: 10.1039/AN9921700899

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