Bj. Herbert et Jg. Dorsey, N-OCTANOL WATER PARTITION-COEFFICIENT ESTIMATION BY MICELLAR ELECTROKINETIC CAPILLARY CHROMATOGRAPHY, Analytical chemistry, 67(4), 1995, pp. 744-749
Micellar electrokinetic capillary chromatography (MECC) was evaluated
as an a priori predictor of n-octanol-water partition coefficients (lo
g K-ow). Retention measurements for over 100 solutes with widely varyi
ng functionality were used to construct a universal calibration for th
e estimation of octanol-water partition coefficients with r(2) = 0.835
. The calibration covers in excess of 9 orders of magnitude in log K-o
w and 4 orders of magnitude in log capacity factor. If solute structur
e, size, and hydrogen-bonding character are known, accuracy can be inc
reased by use of improved calibrations. This method reduces the labora
tory-to-laboratory variability and the long analysis time due to the m
ultiple mobile phases necessary in current HPLC methods for estimating
log K-ow while retaining many of the desired advantages of chromatogr
aphic techniques.