Table 2.

Thirty-eight tested solvent systems for the selection of optimal FCPC mobile and stationary phases. The composition of solvent systems 20–38 was identical to systems 1–19, with the addition of 0.1% formic acid. The experimental K_D values for solvent systems 1–38 are summarized in Table S1

Solvent system	n-Heptane	n-Hexane	n-Pentane	Ethyl acetate	Ethanol	Methanol	Water*
1	0.5			1.5		0.5	1.5
2	1			1		1	1
3	1.5			0.5		1.5	0.5
4	2					2
5	0.5			1.5	0.5		1.5
6	1			1	1		1
7	1.5			0.5	1.5		0.5
8		0.5		1.5	0.5		1.5
9		1		1	1		1
10		1.5		0.5	1.5		0.5
11		1.8		0.2		1.8	0.2
12		1.2		0.8		1.2	0.8
13		1		1		1	1
14		0.8		1.2		0.8	1.2
15		1.6		0.4	1		1
16			0.5	1.5		0.5	1.5
17			1	1		1	1
18			1.5	0.5		1.5	0.5
19				2			2

*Deionized water was used