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660343 
Journal Article 
Retention characteristics of chlorinated polycyclic aromatic hydrocarbons in normal phase HPLC: I. Chloro-added PAHs 
Nilsson, UL; Colmsjo, AL 
1991 
Yes 
Chromatographia
ISSN: 0009-5893
EISSN: 1612-1112 
BIOSIS/92/04275 
32 
7-8 
334-340 
eng 
BIOSIS COPYRIGHT: BIOL ABS. Retention characteristics in normal phase HPLC of highly biologically active chloro-added polycyclic aromatic hydrocarbons (PAHs) were studied. Silica, cyanopropyldimethylsilyl- and aminopropylsilyl- modified stationary phases were investigated. Retention properties of chloro-added PAHs on these phases were shown to be strongly influenced by the number of chloro-additions. This is due to the strong polarity of the methylene carbon at the chloro-addition site. Active silica had a strongly degrading effect on the unstable chloro-added PAHs during separation. Aminopropylsilica did not exhibit sufficient selectivity towards chloro-added PAHs when compared to chlorosubstituted PAHs. Cyanopropyldimethylsilica was shown to be applicable to a group separation of chloro-added and chloro-substituted PAHs. A fast clean-up procedure for chloro-added PAHs in complex samples is outlined. It involves an initial elimination of more polar substances on a short open column with strongly 
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