Alkanol gas-liquid partition coefficients in squalane measured with packedcolumns - A revision of measurement methods

Retention volumes of 13 alkanols were measured at five temperatures between 30 and 60 degrees C in a series of six columns packed with different squal ane percentages on Chromosorb W previously modified with Carbowax 20M accor ding with Aue et al.'s method [J. Chromatogr. 77 (1973) 299]. While alkanol retention times are independent of sample size when chromatographed in the se packings, an important variation is demonstrated in columns packed with squalane coated on Chromosorb W DMCS under otherwise identical conditions. It is demonstrated that the intercepts of plots V-N/V-L vs. 1/V-L (V-N is r etention volume per gram of packing, V-L is stationary phase volume per gra m of packing) cannot be identified with the partition coefficient, and a me thod to calculate the gas-liquid partition coefficient is proposed. (C) 199 9 Elsevier Science B.V. All rights reserved.