Ion-selective electrodes based on long-chain quaternary ammonium salts with enhanced steric accessibility, and their application for determination of hydrophilic double-charged inorganic anion

Ion-selective electrodes based on long-chain quaternary ammonium salts with enhanced steric... salts’ exchange center steric accessibility and presence of a neutral anion carrier, 4-(trifluoroacetyl)benzoic acid heptyl ester, upon analytical characteristics of ion-selective elec- trodes reversible to molybdate, tungstate, sulfate, hydrogen phosphate, sulfite, carbonate and thiosulfate anions, has been studied. When the most sterically hindered quaternary ammonium salts, trinonyl octadecyl ammonium bromide, is replaced by one of the salts with the accessible exchange center, the selectivity is altered, the magnitude of the selectivity coefficient change being determined by the Keywords Ion-selective electrode  Quaternary nature of the interfering ion. Thus, for carbonate- and ammonium salt  Steric accessibility  Neutral anion carrier sulfate-selective ISEs with hydrophobic thiocyanate ions as interference, the effect achieved is 6–8 orders of magni- tude, while with nitrate ions as interference it is 3.4–5.7 Introduction orders, and for such hydrophilic interference ions as sul- fate, chloride and oxalate, it is even less. Replacing tri- Sulfite, molybdate, tungstate, hydrogen phosphate, car- nonyl octadecyl ammonium bromide with a sterically bonate, thiosulfate and sulfate ions occur in natural and/or accessible ammonium salt improves lower detection limit waste waters. They are also used in laboratory practice as generally by 1–2 orders, while for sulfite and thiosulfate corresponding salts; in addition, sulfites, http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Chemical Papers Springer Journals

Ion-selective electrodes based on long-chain quaternary ammonium salts with enhanced steric accessibility, and their application for determination of hydrophilic double-charged inorganic anion

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Publisher
Springer Journals
Copyright
Copyright © 2017 by Institute of Chemistry, Slovak Academy of Sciences
Subject
Chemistry; Chemistry/Food Science, general; Industrial Chemistry/Chemical Engineering; Biochemistry, general; Medicinal Chemistry; Materials Science, general; Biotechnology
ISSN
0366-6352
eISSN
1336-9075
D.O.I.
10.1007/s11696-017-0320-7
Publisher site
See Article on Publisher Site

Abstract

salts’ exchange center steric accessibility and presence of a neutral anion carrier, 4-(trifluoroacetyl)benzoic acid heptyl ester, upon analytical characteristics of ion-selective elec- trodes reversible to molybdate, tungstate, sulfate, hydrogen phosphate, sulfite, carbonate and thiosulfate anions, has been studied. When the most sterically hindered quaternary ammonium salts, trinonyl octadecyl ammonium bromide, is replaced by one of the salts with the accessible exchange center, the selectivity is altered, the magnitude of the selectivity coefficient change being determined by the Keywords Ion-selective electrode  Quaternary nature of the interfering ion. Thus, for carbonate- and ammonium salt  Steric accessibility  Neutral anion carrier sulfate-selective ISEs with hydrophobic thiocyanate ions as interference, the effect achieved is 6–8 orders of magni- tude, while with nitrate ions as interference it is 3.4–5.7 Introduction orders, and for such hydrophilic interference ions as sul- fate, chloride and oxalate, it is even less. Replacing tri- Sulfite, molybdate, tungstate, hydrogen phosphate, car- nonyl octadecyl ammonium bromide with a sterically bonate, thiosulfate and sulfate ions occur in natural and/or accessible ammonium salt improves lower detection limit waste waters. They are also used in laboratory practice as generally by 1–2 orders, while for sulfite and thiosulfate corresponding salts; in addition, sulfites,

Journal

Chemical PapersSpringer Journals

Published: Oct 22, 2017

References

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