Table 2. Polymer Volume Fraction of Hydrogel Discs at pH 1.2, 4.5, 6.8, and 7.4.

formulation code	Veq (pH 1.2)	V2 = 1/Veq (pH 1.2)	Veq (pH 7.4)	V2 = 1/Veq (pH 7.4)
CM-1	2.89	0.346020761	9.85	0.101522843
CM-2	2.96	0.337837838	10.01	0.0999001
CM-3	3.12	0.320512821	10.97	0.091157703
CM-4	2.96	0.337837838	10.01	0.0999001
CM-5	3.08	0.324675325	10.45	0.09569378
CM-6	3.18	0.314465409	10.75	0.093023256
CM-7	2.96	0.337837838	10.01	0.0999001
CM-8	2.65	0.377358491	9.76	0.102459016
CM-9	2.54	0.393700787	9.61	0.104058273