Water Hardness Electrodes with Ionophores Containing Oxy- and Ester-Groups
- Authors: Levin M.B.1, Khripoun G.A.1, Korneev S.M.2, Mikhelson K.N.1
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Affiliations:
- Chemistry Institute
- Institute of Chemistry
- Issue: Vol 54, No 4 (2018)
- Pages: 391-399
- Section: Article
- URL: https://journals.rcsi.science/1023-1935/article/view/189326
- DOI: https://doi.org/10.1134/S1023193518040055
- ID: 189326
Cite item
Abstract
Lipophilic compounds combining oxy- and ester-groups are synthesized and studied as neutral ionophores in plasticized PVC membranes for the development of novel water hardness ion-selective electrodes. Electrodes based on the ionophores studied showed a higher selectivity to calcium over magnesium ions. However, for electrodes based on hexadecyl-4-hydroxybutanoate or decyloxybutanol this preference turned to be rather low: logKCaMg=–(0.5–0.7). Electrodes with membranes containing hexadecyl-4- hydroxybutanoate, 0.3 M as a neutral ionophore and bis[4-(1,1,3,3-tetramethylbutyl)phenyl]phosphate, 0.01 M as a charged ionophore, in combination with Ca2+-selective electrode based on ETH 1001 as ionophore, proved to be suitable for measurements of water hardness, also for the measurement of Mg2+ ion content in artificial aquarium fish-breeding water samples and in samples modeling electrolyte composition of blood serum.
About the authors
Mikhail B. Levin
Chemistry Institute
Email: konst@km3241.spb.edu
Russian Federation, Stary Peterhof, St. Petersburg, 198504
Galina A. Khripoun
Chemistry Institute
Email: konst@km3241.spb.edu
Russian Federation, Stary Peterhof, St. Petersburg, 198504
Sergei M. Korneev
Institute of Chemistry
Email: konst@km3241.spb.edu
Germany, Osnabrűck
Konstantin N. Mikhelson
Chemistry Institute
Author for correspondence.
Email: konst@km3241.spb.edu
Russian Federation, Stary Peterhof, St. Petersburg, 198504