Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116012, Peoples R China; GSF Forschungszentrum Umwelt & Gesundheit GMBH, Inst Okol Chem, D-85764 Oberschleissheim, Germany; Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
A method has been developed for peak recognition of 136 polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) at different temperature programs. Their retention behaviours are predicted on the basis of an identification database of retention values (A, B) of gas chromatography. By the retention times of C-13 labelled 2,3,7,8-substituted PCDD/F internal standards, the retentions of all PCDDs and PCDFs can be calculated. After comparison with the retentions of practical environmental samples, the predicted values have been proved to be very accurate. (C) 2000 Elsevier Science Ltd. All rights reserved.