NASA NTRS · 19920066615
An intercomparison of five ammonia measurement techniques
Abstract
Results obtained from five techniques for measuring gas-phase ammonia at low concentration in the atmosphere are compared. These methods are: (1) a photofragmentation/laser-induced fluorescence (PF/LIF) instrument; (2) a molybdenum oxide annular denuder sampling/chemiluminescence detection technique; (3) a tungsten oxide denuder sampling/chemiluminescence detection system; (4) a citric-acid-coated denuder sampling/ion chromatographic analysis (CAD/IC) method; and (5) an oxalic-acid-coated filter pack sampling/colorimetric analysis method. It was found that two of the techniques, the PF/LIF and the CAD/IC methods, measured approximately 90 percent of the calculated ammonia added in the spiking tests and agreed very well with each other in the ambient measurements.
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Williams, E. J., Sandholm, S. T., Bradshaw, J. D., Schendel, J. S., Langford, A. O., Quinn, P. K., Lebel, P. J., Vay, S. A., Roberts, P. D., Norton, R. B.. 1992-07-20. An intercomparison of five ammonia measurement techniques. https://ntrs.nasa.gov/citations/19920066615
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