Resumo

HIDOURI, S.; BACCAR, Z. M.; ERRACHID, A.  e  RUIZ-SANCHEZ, O.. High Sensitive and Selective Hydrogen Phosphate ISFET Based on Polyvinyl Chloride Membrane. Port. Electrochim. Acta [online]. 2015, vol.33, n.6, pp.343-351. ISSN 0872-1904.  https://doi.org/10.4152/pea.201506343.

The present work describes the preparation and characterization of polyvinyl chloride membrane doped with methyl-salin ionophore. This electrode was successfully used for selectivity and high sensibility of monohydroxiphosphate in aqueous solution. 1 μM detection limit of mono-hydrogen phosphate was obtained by using dibutyl phthalate and o-nitrophenyl octyl ether-poly vinyl chloride membrane in dynamic solution. The co-existence of a large excess of salts did not interfere with the detection in case of onitrophenyl octyl ether-poly vinyl chloride membrane that maked this selective electrode more adequate for the monohydrogen detection. Also, a highly selective and sensitive dihydrogen phosphate sensor was fabricated by autoassembly of polyvinyl chloride into silicium nitride gate of ISFET.

Palavras-chave : Phosphate sensor; Sensitive; Ionophore; PVC; ISFET.

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