Determination Of O-xylene Research Articles

Sorption Preconcentration and Determination of o-Xylene and Polynuclear Aromatic Hydrocarbons in Atmospheric Precipitates by Gas Chromatograpgy–Mass Spectrometry

The conditions of the sorption concentration of o-xylene and polynuclear aromatic hydrocarbons (PAHs) on hypercrosslinked polystyrene in the dynamic mode are developed. A procedure is proposed for the determination of o-xylene and PAHs in thawed snow, based on the sorption preconcentration of these compounds and their further determination by gas chromatography–mass spectrometry. Samples of thawed snow taken in the park of Moscow State University are analyzed.

Flow-injection Fourier transform infrared spectrometric analysis

A method has been developed for obtaining and storing the complete Fourier transform spectrum, of a sample in a flowing stream in only 19 s. A resolution of 4 cm −1 is recommended. The determination of o-xylene in xylol was employed as a test system, using hexane as a carrier and diluent in all the experiments. A classical liquid flow cell and a demountable flow-through cell were compared. The best limit of detection obtained was 0.01% (v/v). The effects of flow-rate and injection volume were studied for the two cells used. The relative standard deviation (0.4% o-xylene, n = 5) was ca. 1%

Determination of o-Xylene in Recycle Styrene

Determination of <i>o</i>-Xylene in Recycle Styrene