Abstract

An infrared analysis of toxic gases and vapors trapped in charcoal tubes is described. A minimum volume infrared liquid cell, optimized for sensitivity, is described and design compromises are discussed. The CS₂ extraction methodology was examined and recommendations are made to increase the extraction efficiency. Ten compounds on the OSHA list of toxic gases and vapors were studied; in all cases, good spectra useful for qualitative identification were obtained at less than the threshold limit value. Quantitative limits below threshold limit value levels are also reported for the compounds selected.

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