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Separation of atropisomeric polychlorinated biphenyls by cyclodextrin modified micellar electrokinetic chromatography

✍ Scribed by Wei-Chao Lin; Fang-Chu Chang; Chun-Hsiung Kuei

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 137 KB
Volume: 11
Category: Article
ISSN: 1040-7685
DOI: 10.1002/(sici)1520-667x(1999)11:3<231::aid-mcs9>3.0.co;2-s

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✦ Synopsis

The enantiomeric separation of atropisomeric polychlorinated biphenyls Ž was studied by cyclodextrin-modified micellar electrokinetic chromatography CD-. MEKC . Four CD derivatives were investigated as chiral selectors, and 2-hydroxyl-␥-CD gave the best resolution for the separation of PCB 84. Three organic modifiers, methanol, acetonitrile, and 2-propanol, were individually added in the separation buffer to enhance the chiral separation selectivity. The addition of organic solvent effectively increased the enantiomeric resolution. Seven pairs of Ž . atropisomeric polychlorinated biphenyls PCBs were simultaneously separated, and each pair achieved successful separation when 20% organic modifier was added to the separation buffer. 2-Propanol gave the best resolution among these three organic modifiers.

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