Comparison of Measurements of Atmospheric Ammonia by Filter Packs, Transition-Flow Reactors, Simple and Annular Denuders and Fourier Transform Infrared Spectroscopy

摘要

Using data obtained during the 1985 Nitrogen Species Methods Comparison Study(Atmos. Environ. 22, 1517 (1988)), several measurement methods for sampling ambient ammonia are compared. Eight days of continuous measurements at Pomona College, a smog receptor site in Los Angeles, provided an extensive data base for assessment of the following methods: Fourier transform infrared spectroscopy (FTIR), three filter pack configurations, a simple and an annular denuder, and the transition flow reactor. FTIR was defined as the reference method and it