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

Table 4

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

System	𝑎	𝑏	𝑐	𝑑	R ^2	sd^a
[EPy]Br + Na2HPO4	4.5736	−0.4040	0.0271	−0.0011	0.9972	0.96
[EPy]Br + K2HPO4	4.7432	−1.0384	0.3074	−0.0157	0.9992	0.14
[EPy] + K2SO4	4.9165	−1.2750	0.3488	−0.0303	0.9996	0.15
[EPy]Br + C4O6H4KNa	4.5676	−0.2982	0.0246	−7.0600𝐸−4	0.9995	0.30

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