Abstract
In the production of styrene, it is important to be able to determine ethyl benzene and styrene in the presence of each other as an indication of sources of dispersion of vapors from the closed reaction system. The air is drawn at a fixed rate through a fritted-glass bubbler containing spectre-grade isooctane. The absorption of ultraviolet light at wavelengths of 268 mμ for the ethyl benzene and 291 mμ for the styrene is used as a measure of the amounts of these compounds collected from the air. This method has the advantages of sampling over a wide range of concentrations, of specificity, and of facility in both field and laboratory phases.