Gas chromatographic separation of PCB and OCP by photocatalytic degradation

Abstract

A photocatalytic degradation method was developed for polychlorobiphenyl (PCB) and organochloride pesticide (OCP) discrimination and quantification. A mixture of Aroclor 1260 and p,p'-DDT was irradiated at 254 nm by UV lamp (40 W) in the presence of TiO2 (30 mg mL(-1) non-aqueous solution). Comparison of gas chromatograms showed that p,p'-DDT signals decreased significantly after irradiation, while Aroclor 1260s chromatograms did not show any difference before and after irradiation. Detection limits were 0.30 mg L-1 and 0.15 mg L-1 for p,p'-DDT and Aroclor 1260, respectively. The method was applied to spiked egg samples, the recoveries were found as 72% for DDT and 82.01% for Aroclor 1260. (c) 2005 Elsevier B.V. All rights reserved.