Table 5. Overall Thermodynamic Formation Parameters for H⁺- and As(III)-DMSA Species in NaCl at I = 0.15 mol L^–1 and T = 298.15 K.

reactiona	–ΔGb	ΔHb	TΔSb
L + H = LH	62.8 ± 0.2	22 ± 3	84.8 ± 3
L + 2H = LH2	115.9 ± 0.2	40 ± 3	155.9 ± 3
L + 3H = LH3	136.2 ± 0.1	65 ± 2	201.2 ± 2
L + 4H = LH4	150.6 ± 0.2	57 ± 3	207.6 ± 3
M + L + 3H = MLH3	171.0 ± 0.5	–20 ± 3	151 ± 3
M + L + 2H = MLH2	147.6 ± 0.5	–32 ± 4	115.6 ± 4
M + L + H = MLH	94.9 ± 0.5	–50 ± 4	44.9 ± 4

^aCharges omitted for simplicity.

^bIn kJ mol^–1, ±standard deviation.