The Use of Graphitized Carbon Black as a Trapping Material for Organic Compounds in Light Gases Before a Gas Chromatographic Analysis

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Abstract
Graphitized carbon black is a powerful, nonselective adsorbent; it does not retain water and light gases practically, has a chemically inert surface and is stable at high temperatures. The authors show that acceptable quantitative trapping efficiencies of dimethylphthalate and trimethylphosphate on graphitized carbon black are obtained at concentrations between .02 to 4.5 ppm in dry nitrogen. So the use of graphitized carbon black for trapping and concentration of trace compounds in gases before gas chromatographic analysis should be considered.