Ultraviolet Spectrophotometric Determination of Styrene in Ethylbenzene

Study of degradation of polystyrene, using ultraviolet spectrophotometry

“…The absorption b ands shown ar e due to th e presence of the double bond in conjugation wi th the benzene ring and form th e very characteristic spectrum t hat is distinguish able from that of sa turated derivatives and from that of unsaturated compounds without th e double bond in conj ugation with t h e b enzene ring [9] . This pattern of absorptance displayed by the monom er permits quantitative de termination of styren e in polystyrene spectrophotometrically [6,8] as well as the determination of monomer styr ene in ethylb enzene [10].…”

Petroleum

“…Young et al ( 126) determined type of substitution in aromatic compounds from the infrared patterns of benzene derivatives, in the 5-to 6-micron region. Grosskopf (24) described an apparatus and method for microchemical chromometric determination of gases in air or other volatile substances, including benzene in vaporized motor fuel; the gas was drawn through a tube containing a solid carrier impregnated with indicator, Hadden and Perry (25) determined styrene in ethylbenzene by ultraviolet absorption at 2900 to 3100 A.; small amounts of benzene and toluene do not interfere. Marquardt and Luce (66) determined divinylbenzene in dehydrogenated diethylbenzene by precipitating its nitrosite and weighing; styrene interferes.…”