Abstract
EPA method No. 5 for the determination of particulate emission requires the dry molecular weight of the gas. A gas chromatographic (GC) technique has been developed as a substitute for the chemical ORSAT technique. The GC technique has several advantages: one, the stack gas can be analyzed rapidly for CO/sub 2/, O/sub 2/, CO, and N/sub 2/ directly; two, the sample for the GC analysis is obtained via an on-stream sampling system, thus reducing potential contamination as opposed to the necessary grab samples and containers for the ORSAT analyzer; three, the analog signal from the GC is interfaced simultaneously to a recorder and integrator, thus giving a graphical and digital readout. The GC sampling and analysis system is described, and a procedure for preparing gas mixtures is presented. Data showing the correlation among the theoretical composition, GC analysis, and ORSAT analyses of gas mixtures and stack gases are presented.
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