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

The accuracy of the infinite dilution activity coefficients reported in Part 1 is examined here through two independent tests. First, the data are critically compared to values reported in the literature which were obtained by several different techniques, including headspace gas chromatography. Second, the data are validated by studying the consistency between our partition coefficient data for normal alkanes (n-pentane to n-nonane) and those obtained 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 that the precision of the method is better than 5%.