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. 2019 Sep 12;5(9):e02425. doi: 10.1016/j.heliyon.2019.e02425

Table 3.

Association constants, ks (M−1), between surfactant monomer and counter-ions.

Surfactant Br- Cl-
C14H29(CH3)3N+ - 9.774
C12H25(CH3)3N+ 19.759 7.152
C10H21(CH3)3N+ 11.324 5.885
(CH3)4N+ (from literature) 0.83 0.29