Table 2.

logD–logk_w relationships derived from model compounds 1–14 at different mobile phases.

	Buffer	pH	logD–logkw	R2
This work	Phosphate buffer	7.0	logD = (1.13 ± 0.14) logkw − (0.44 ± 0.23)	0.825
		8.0	logD = (1.02 ± 0.07) logkw − (0.21 ± 0.12)	0.943
		9.0	logD = (1.01 ± 0.05) logkw − (0.22 ± 0.09)	0.968
		10.0	logD = (1.01 ± 0.05) logkw − (0.26 ± 0.09)	0.969
Qi et al. [21]	Ammonia solution	9.0	logD = (1.07 ± 0.07) logkw − (0.28 ± 0.12)	0.944
		10.0	logD = (1.01 ± 0.08) logkw − (0.19 ± 0.13)	0.928
	TEA solution	9.0	logD = (1.00 ± 0.07) logkw − (0.14 ± 0.12)	0.935
		10.0	logD = (1.05 ± 0.07) logkw − (0.15 ± 0.12)	0.941