Headspace gas chromatographic measurements of limiting activity coefficients of eleven alkanes in organic solvents at 25 degrees C. 2. Accuracy and precision

The accuracy of the infinite dilution activity coefficients reported in Par t 1 is examined here through two independent tests. First, the data are cri tically compared to values reported in the literature which were obtained b y several different techniques, including headspace gas chromatography. Sec ond, the data are validated by studying the consistency between our partiti on coefficient data for normal alkanes (n-pentane to n-nonane) and those ob tained for the solutes methane to butane by completely different methods. A long-term study performed by using n-hexadecane as a solvent allowed us to control the consistency of this set of measurements and also established t hat the precision of the method is better than 5%.