Field Compatible NO _x Emission Measurement Technique

A simple and feasible approach to the measurement of oxides of nitrogen (NO_x) from internal combustion engines is to collect engine exhaust in bags and subsequently analyze the samples with conventional laboratory equipment. The measurement technique that was developed for this purpose incorporates a portable apparatus for collecting bag samples and fuel specific NO_x emission calculation methods outlined in the July 23, 1979, Federal Register, Stationary Internal Combustion Engines--Proposed Rules.