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

Zulfiqur Ali; C. L. Paul Thomas; John F. Alder; Geoffrey B. Marshall

doi:10.1039/an9921700899

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

Zulfiqur Ali, C. L. Paul Thomas, John F. Alder, Geoffrey B. Marshall

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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.

Original language	English
Pages (from-to)	899-903
Journal	The Analyst
Volume	117
Issue number	5
DOIs	https://doi.org/10.1039/an9921700899
Publication status	Published - 1 Jan 1992

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title = "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.",

author = "Zulfiqur Ali and Thomas, {C. L. Paul} and Alder, {John F.} and Marshall, {Geoffrey B.}",

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AU - Ali, Zulfiqur

AU - Thomas, C. L. Paul

AU - Alder, John F.

AU - Marshall, Geoffrey B.

N1 - Author can archive publisher's version/PDF.

PY - 1992/1/1

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N2 - 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.

AB - 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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DO - 10.1039/an9921700899

M3 - Article

SN - 0003-2654

VL - 117

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EP - 903

JO - The Analyst

JF - The Analyst

IS - 5

ER -

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

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