Prediction of the retentions of polybrominated dibenzo-p-dioxins (PBDDs) by using the retentions of polychlorinated dibenzo-p-dioxins (PCDDs)

The retention equations ln k' = A + B/T of 49 polychlorinated dibenzo-p-dio xins (PCDDs) and 4 polybrominated dibenzo-p-dioxins (PBDDs) in gas chromato graphy (GC) have been investigated to evaluate the properties of regression coefficients A and B. The quantitative relationships between A and B value s of PCDDs and those of PBDDs are found. The regression equations derived h ave correlation coefficients greater than 0.997. The A, B values of any PBD D can be predicted by using the A, B values of the PCDD according to these relationships. Using these predicted A and B values, the retention times of all PBDDs can be predicted at any temperature program. It is very useful t o identify the peak position of any PBDD because at present there are only a few standards of PBDDs available. (C) 2000 Elsevier Science Ltd. All righ ts reserved.