Ion-Selective Electrode for Anionic Surfactants Using Hexadecyl Trimethyl Ammonium Bromide-Sodium Dodecylsulfate as an Active Ionophore

Table 3

Potentiometric selective coefficients for anionic surfactant selective electrode.

Interfering ion	𝑘^potDS−,𝑋− (log)	Interfering ion	𝑘^potDS−,𝑋− (log)
F^−	−4.34	SO3^2−	−5.02
Cl^−	−3.94	CO3^2−	−4.55
Br^−	−4.27	HCO3^−	−3.46
I^−	−4.22	CH3COO^−	−3.55
NO3^−	−4.26	C2O4^2−	−4.85
SO4 ^2−	−4.89	(C4H4O6^2−)^a	−4.97
PO4 ^3−	−5.13	(C6H5O7^3−)^b	−4.59

^atartrate,  ^bcitrate.