Figure 5: Analytical curves in A (a), B (b), and C (c) regions for ethanol in W phase with alterations in temperature using water-n-propanol-oleic acid MEs at 23°C. Inset: ΔΦ as a function of ΦE for 7.00%, 30.00%, and 60.00% v/v ΦE taking the changes of 23 to 20°C, 23 to 26°C, and 23 to 29°C. R2 values were larger than 0.99. Analytical sensitivities were: -0.41/-0.71 (20), -0.42/-0.73 (26), and -0.40/-0.76 (29°C) in A; -0.40/- 0.73 (20), -0.40/-0.79 (26), and -0.44/-0.76 (29°C) in B; and -0.19/- 0.28 (20), -0.18/-0.30 (26), and -0.22/-0.23 (29°C) in C. ΔΦ is given in module.