Liquid-Liquid Equilibrium Data for the Ionic Liquid N-Ethyl-Pyridinium Bromide with Several Sodium Salts and Potassium Salts

Table 3

Parameters of (2) for the [EPy]Br (1) + salt (2) + water (3) ATPS at 𝑇 = 298.15 K.

System	a	b	c	R ^2	sd^a
[EPy]Br + Na2HPO4	92.2445	−0.3321	1.9677𝐸−5	0.9978	0.84
[EPy]Br + K2HPO4	75.9749	−0.3544	−2.5871𝐸−5	0.9991	0.88
[EPy]Br + K2SO4	89.4813	−0.5691	1.4900𝐸−3	0.9997	0.12
[EPy]Br + C4O6H4KNa	91.7650	−0.2277	5.7919𝐸−6	0.9994	0.17

asd = (∑^𝑁_𝑖=1(𝑤^cal_𝑖−𝑤_𝑖^exp)²/𝑁)^0.5. Where 𝑤_𝑖^exp is the experimental mass fraction of IL and 𝑤^cal_𝑖 is the corresponding data calculated using (2). The term “N” represents the number of solubility data.