"EPA/600-SR-93-088." "July 1993." At head of title: Project Summary.

The combustion of fossil fuels is suspected to contribute to measured increases in ambient concentrations of nitrous oxide (Nb2sO). Accurate and reliable measurement techniques would help to assess the relative contribution of fossil fuel combustion Nb2sO emissions to the increase in ambient concentrations. The characterization of Nb2sO emissions from fossil fuel combustions sources has been hindered by the lack of suitable and acceptable grab sampling artifact where Nb2sO is actually generated in the sample container in the presence of SOb2s, NOx, and moisture. On-line monitoring techniques are limited and, of those available, instrument costs are often prohibitive, detection levels are often insufficient, and the techniques are often susceptible to interferences present in combustion process effluents. The report documents the technical approach and results achieved while developing a grab sampling method and an automated, online gas chromatography method suitable to characterize Nb2sO emissions from fossil fuel combustion sources. The two methods developed have been documented as EPA/Air and Energy Engineering Research Laboratory (AEERL) Recommended Operating Procedures (ROPs).