The Research and Mechanism of Extracting Vitamin B6 Using Aqueous Two-Phase Systems

Table 5

Parameters of equation (7) for the mixture of polyethylene glycol/isopropyl alcohol + ethanol + salt (Na₂CO₃/Na₂SO₄) + water ATPSs at different temperatures.

T (K)	a1	b1	a2	B2	c	R^2	sd^a
Polyethylene glycol + ethanol + Na2SO4
308.15	0.4714	0.0106	0.5846	0.1469	−0.0988	0.9996	0.0021
318.15	0.6345	0.1550	1.4162	0.0085	−0.1290	0.9987	0.0033
328.15	0.3606	0.1796	0.6974	0.1796	−0.1927	0.9994	0.0027
Isopropyl alcohol + ethanol + Na2SO4
308.15	0.1840	0.0200	0.5688	0.2656	−0.1798	0.9998	0.0012
Isopropyl alcohol + ethanol + Na2CO3
308.15	0.4960	0.1408	0.5407	0.0084	−0.0638	0.9996	0.0014

^aDefinition is given in Table 3.