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

Table 5

Parameters of (4) for the [EPy]Br (1) + salt (2) + water (3) ATPS at 𝑇=298.15 K.

System	a 1	b 1	a 2	b 2	𝑐	R ^2	sd^a
[EPy]Br + Na2HPO4	23.3946	−3.4874𝐸19	61.9954	11.0376	−16.9351	0.9859	2.14
[EPy]Br + K2HPO4	9.4472	−8.8659𝐸22	32.6463	2.7530	20.9157	0.9968	0.27
[EPy] + K2SO4	9.0913	−2.2954𝐸19	73.7805	7.5619	−26.0714	0.9996	0.49
[EPy]Br + C4O6H4KNa	9.8253	−2.8063𝐸23	49.0484	8.0236	19.4759	0.9911	1.28

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 (4). The term “N” represents the number of solubility data.