Table 1 Density of the solvent ( ρ ₀ ), experimental slopes and the correlation coefficients of fits (as r ² ) of sodium dodecyl sulphate in presence of cetyltrimethylammonium bromide from Figures 1 , 2 and 3 in pure water and methanol–water mixtures at 308.15, 318.15 and 323.15 K

T= 308.15 K

T= 318.15 K

T= 323.15 K

Volume fraction of methanol

slope

ρ ₀

r²

slope

ρ ₀

r²

slope

ρ ₀

r²