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Enantioseparations with the macrocyclic antibiotic ristocetin a using a countercurrent process in CE

✍ Scribed by Tanya M. Oswald; Timothy J. Ward

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 113 KB
Volume: 11
Category: Article
ISSN: 0899-0042
DOI: 10.1002/(sici)1520-636x(1999)11:8<663::aid-chir9>3.0.co;2-v

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✦ Synopsis

The chiral selectivity of ristocetin A was examined in a countercurrent process in CE using a coated column to suppress electroosmotic flow. Excellent enantioseparations of several nonsteroidal antiinflammatories, dansylamino acids, dinitrophenyl-derivatized amino acids, and other optically active compounds were achieved. The chiral selectivity of ristocetin A also was examined as a function of antibiotic concentration and pH. Enantioresolution was found to significantly improve with a slight increase in migration time upon increasing chiral selector concentration. Enantioselectivities were found to be greatly influenced by pH of the running buffer.

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