Use of binary and ternary mobile phases in reversed-phase high performance liquid chromatographic separation of chiral compounds.
The influence of the nature of typical organic modifiers, used in reversed-phase systems diluted with water, on retention and selectivity of chiral acetylated diamines and acetonitriles possessing pharmacological activity was investigated. Linear, semi-logarithmic relationships between the logarithm of the retention factor, k, of the enantiomer and the volume fraction, phi, of the organic modifier in the binary aqueous-organic eluent were established for chiral stationary phases. The slope of a plot of log k vs. the modifier volume fraction depends not only on the chemical structure of the chromatographed enantiomers, but also on the nature of the modifier. Moreover, the enantioselectivity of the studied racemates also depends on the nature and concentration of the modifier and is higher for a methanol mobile phase than for acetonitrile.
Gołkiewicz
Władysław
W
Department of Inorganic and Analytical Chemistry, Medical University, 6 Staszica Str, 20-081 Lublin, Poland. blazewic@panaceum.am.lublin.pl
Błazewicz
Anna
A
Matosiuk
Dariusz
D
D000438:Alcohols / Q000737:chemistry / Q000302:isolation & purification; D000588:Amines / Q000737:chemistry / Q000302:isolation & purification*; D000596:Amino Acids / Q000737:chemistry / Q000302:isolation & purification*; D002264:Carboxylic Acids / Q000737:chemistry / Q000302:isolation & purification*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D007202:Indicators and Reagents; D013237:Stereoisomerism
D000438:Alcohols; D000588:Amines; D000596:Amino Acids; D002264:Carboxylic Acids; D007202:Indicators and Reagents