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Materiale Plastice
https://doi.org/10.37358/Mat.Plast.1964

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Materiale Plastice, Volume 40, Issue 1, pp. (2003)


Cristina Mihali, Gabriela Oprea, Elena Hopirtean

Electrode with PVC Matrix, Selective to Sodium Laurylsulfate Anionic Surfactant


Abstract:
A laurylsulfate-selective electrode is presented. The sensing material of the electrode consists of an ion pair 1:1 water insoluble salt that has been prepared using sodium laurylsulfate and hexadecyl trimethylammonium bromide and was immobilized in a PVC membrane plasticized with orto-nitrophenyl octyl ether. This electrode gives a linear response for sodium laurylsulfate between 8x10-7 - 5x10-3 M with a slope of 57,7 mV per decade of sodium laurylsulfate concentration. The electrode has been applied to potentiometric titration of anionic surfactant using cationic surfactant as titration agents.


Keywords:
ion-selective electrodes; anionic surfactant; potentiometry; sodium laurylsulfate

Issue: 2003 Volume 40, Number 1
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