ISOMER IDENTIFICATION OF CHLORINATED DIBENZO-P-DIOXINS BY ORTHOGONAL SPECTROSCOPIC AND CHROMATOGRAPHIC TECHNIQUES

Isorner differentiation of chlorinated dibenzo-p-dioxin (CDD) isomer p air components was examined by three orthogonal chromatographic (gas c hromatography, liquid chromatography, and micellar electrokinetic chro matography) techniques and three orthogonal spectroscopic (Fourier tra nsform infrared and carbon-13 and proton nuclear magnetic resonance) t echniques. Synthetic CDD isomer pair mixtures from the same sample set were separated by methods using independent partitioning dynamics and identified by spectroscopic methods using independent energy/structur e transformations. This integrated approach using orthogonal methods m inimizes isomer identification error probability and results in an exc ellent agreement among methods in isomer assignment.