AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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STUDIA CHEMIA - Ediţia nr.1-2 din 2001 | |||||||
Articol: |
POTENTIOMETRIC ANALYSIS OF ANIONIC SURFACTANTS BY ION-SELECTIVE ELECTRODE CONTAINING METHYLTRICAPRYLAMMONIUM CHLORIDE. Autori: CRISTINA MIHALI, ELENA HOPÂRTEAN, GABRIELA OPREA. |
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Rezumat: Surfactants are very important in modern society, but they are also important pollutants. They have a negative impact on the environment especially on water. Anionic surfactants are the most widespread among the surfactants class. They comprise approximately 70% of all the surfactants manufactured; therefore they are often subject of environmental monitoring. The determination of anionic surfactants with surfactants-selective electrodes is an alternative method to the standard methylene blue-method and the two-phase titration method. We realised a polymeric membrane electrode selective to anionic surfactant based on methyltricaprylammonium chloride and plasticized with tricresylphosphate. This electrode gives a linear response for sodium dodecylsulphate between 5x10-6 and 5x10-3 with a nearnernstian slope. | |||||||