P. Haglund, ENANTIOSELECTIVE SEPARATION OF POLYCHLORINATED BIPHENYL ATROPISOMERS USING CHIRAL HIGH-PERFORMANCE LIQUID-CHROMATOGRAPHY, Journal of chromatography, 724(1-2), 1996, pp. 219-228
Citations number
18
Categorie Soggetti
Chemistry Analytical","Biochemical Research Methods
Permethylated beta-cyclodextrin derivatized silica was used as the chi
ral stationary phase in reversed-phase HPLC to separate the atropisome
rs of polychlorinated biphenyls (PCBs). The retention behaviour of 26
atropisomers was studied under optimum chromatographic conditions. Thi
rteen atropisomers could be completely resolved and six were partially
separated. Among the atropisomers separated 14 are of environmental r
elevance since they do not enantiomerize at physiological temperatures
. A retention behaviour study showed that tri-ortho PCBs, which lack '
'buttressing'' chlorine substituents in the 3'-position, are difficult
to separate. The best resolution was obtained for PCBs with 2,3,6-sub
stitution in the less substituted biphenyl ring.