Bestimmung coplanarer polychlorierter Biphenyle in Mineral- und Altölen

Abstract

Determination of Coplanar Polychlorinated Biphenyls in Mineral Oils and Waste Oils Due to insufficient waste management polychlorinated biphenyls (PCB) are often found in waste oils and in recycled mineral oil products. Because of their structure coplanar PCBs are more toxic than other congeners and insofar possibly comparable to polychlorinated dioxins and furans (PCDD/F). Known analytical methods for PCBs in mineral oils do not distinguish between the different toxic congeners. This paper describes a method of selective measurement of eleven coplanar PCBs from mineral oils. The complexity of the matrix and the very low concentration of the analytes require a laborious clean‐up procedure: Solid phase extraction (SPE) on silica impregnated with sulfuric acid, gel permeation chromatography, direct treatment with conc. sulfuric acid and chromatography on alumina. After separation of the co‐planar congeners from the other PCBs by chromatograpy on activated charcoal and on basic alumina they are determined by GC/high‐resolution‐MS.