Critical Evaluation and Comparison of Measurement Methods for Nitrogenous Compounds in the Atmosphere

摘要

This report describes the method and results of an intensive field study of atmospheric nitrogenous pollutants conducted in Claremont, California, a Los Angeles smog receptor site, during selected September and October 1980 photochemical episodes. Parameters measured included nitric oxide and nitrogen dioxide, peroxyacetylnitrate, and refined particulate nitrate and nitric acid. In addition, a limited number of refined particulate samples collected on quartz filters were analyzed for sulfate and for total carbon. All sampling and monitoring instruments were calibrated on-site following Environmental Research and Technology's Standard Operating Procedures. Laboratory quality assurance protocols included appropriate calibrations, analysis of blank and field control filters, analysis of EPA audit samples, and replicate analyses. Sampling control experiments included a number of parallel collections on Teflon filters.