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The Testing of Carbon Sorbent for Preconcentration of Volatile Organic Trace Compounds

S. Škrabáková, E. Matisová, M. Onderová, I. Novák, and D. Berek

Department of Analytical Chemistry, Faculty of Chemical Technology, Slovak Technical University, SK-812 37 Bratislava

 

Abstract: Carbon sorbent Carb I (prepared by controlled pyrolysis of saccharose) was tested for preconcentration of volatile organic compounds from the gas phase. The model mixture of hydrocarbons (n-alkanes and aromatics) and mixture of aromatics with low-boiling polar solvents was used. For desorption of compounds several solvents were utilized, carbon disulfide was found to be the best. Adsorption-desorption process was studied in the concentration range of components in nitrogen 0.03-15 μg dm-3. Chromatographic measurements were performed on gas chromatograph with on-column and splitless injection, fused silica capillary columns with chemically bonded stationary phases under temperature programmed conditions and flame ionization detector. The recovery of n-alkanes and aromatics was found to be around 90 %, the recovery of low-boiling solvents, particularly of polar character was low.

Full paper in Portable Document Format: 483a169.pdf

 

Chemical Papers 48 (3) 169–174 (1994)

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