Table 2. HIC Peak Distribution and Relative Hydrophobicity^a.

peak area	LS-1	LS-2	LS-3	LS-4	LS-5	LS-6	LS-7
peak 1 (vol %)	69	48	43	28	20	12	22
peak 2 (vol %)	18	22	22	11	12	13	7
peak 3 (vol %)	11	25	31	25	32	32	13
peak 4 (vol %)	<2	5	4	30	34	35	13
peak 5 (vol %)	<2	<2	<2	6	<2	8	45
sum (vol %)	98	100	100	100	100	100	100
relative hydrophobicity	0.1	0.22	0.24	0.44	0.47	0.54	0.63

^aThe nomenclature of lignosulfonate samples was based on the order of hydrophobicity, that is, increasing sample index (LS-1, LS-2, etc.) also implies increasing relative hydrophobicity.