Abstract
The anion-exchange extraction of thiocyanate ions by various quaternary ammonium salts was studied. Exchange constants of thiocyanate ions for the chloride ion \(\left( {\log K_{{{\text{C}}{{{\text{l}}}^{ - }}}}^{{{\text{SC}}{{{\text{N}}}^{ - }}}}} \right)\) were determined. Thus, in the transition from 3,4,5-tris(dodecyloxy)benzyltrimethylammonium bromide to 3,4,5-tris(dodecyloxy)benzyltrilaurylammonium bromide \(\log K_{{{\text{C}}{{{\text{l}}}^{ - }}}}^{{{\text{SC}}{{{\text{N}}}^{ - }}}}\) increases almost tenfold. A film (PVC) thiocyanate-selective electrode was developed (plasticizer 1-bromonaphthalene) on the basis of the trilauryl quaternary ammonium salt. Its main analytical characteristics were determined (slope of electrode function, limit of detection, selectivity coefficients, working pH range). The electrode was used for the determination thiocyanate ions in saliva of smoking and non-smoking people.
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Matveychuk, Y.V. A Thiocyanate-Selective Electrode and Its Analytical Applications. J Anal Chem 75, 662–668 (2020). https://doi.org/10.1134/S1061934820050123
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DOI: https://doi.org/10.1134/S1061934820050123