Retention behaviour of polychlorinated biphenyls on polysiloxane-anchored C60 in gas chromatography

The synthesis of a fullerene-containing stationary phase by chemically linking C-60 to an aminopropylpolysiloxane is described, The stationary phase was applied in gas chromatography to the separation of polychlorinated biphenyl (PCB) isomers with different degrees of substitution in the ortho-position (non-ortho to tetra-ortho substituted). The retention behaviour of several hexachlorobiphenyls was studied systematically by determining the retention increment, R', An increasing R' with decreasing chlorine substituents in the ortho-position of the molecule was observed, i.e. this stationary phase shows increased affinity with increased planarity of the PCB molecule. (C) 1998 Elsevier Science B.V. All rights reserved.