TITLE

PVC MATRX IONIC - SURFACTANT SELECTIVE ELECTRODES BASED ON THE IONIC PAIR TETRA ALKYL-AMMONIUM - LAURYLSULPHATE

AUTHOR(S)
Mihali, Cristina; Oprea, Gabriela; Cical, Elena
PUB. DATE
September 2009
SOURCE
Studia Universitatis Babes-Bolyai, Chemia;2009, Issue 3, p141
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A series of all-solid-state electrodes sensible to the anionic surfactants were developed using silver pills coated with PVC membranes. We used cetyltrimethylammonium laurylsulfate (CTMA-LS) and tricaprylmethylammonium laurylsulfate (TCMA-LS) as electroactive matter (ionophore) and different plasticizers. The electrochemical properties of the electrodes were studied. The best electrochemical characteristics were obtained with TCMALS (dioctylsebaccate as plasticizer): nearnerstinan slope: 58,56 mV/pC; concentration range of linear response 10-3-2x10-6 M∙L-1 of laurylsulfate anion. The selected membrane-electrode can be applied as equivalence point indicator to the potentiometric titration of anionic surfactants and to the determination of anionic surfactants in environmental samples.
ACCESSION #
44784926

 

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