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Blank Membranes versus Ionophore-based Membranes for the Selective Determination of H+
Faculty
Science
Year:
2009
Type of Publication:
Article
Pages:
1131-1135
Authors:
Zareh, Mohsen M
Journal:
ANALYTICAL SCIENCES JAPAN SOC ANALYTICAL CHEMISTRY
Volume:
25
Research Area:
Chemistry
ISSN
ISI:000269868200014
Keywords :
Blank Membranes versus Ionophore-based Membranes , , Selective
Abstract:
A pH electrode for the selective determination of H+ was introduced. Both phosphorated calix{[}6]arene and a N,N'-bisethoxycarbonyl-1,10-diaza-4,7,13,16-tetraoxacyclo-octadecane (DZCE) were used as new H+-ionophores. The calibration graphs of the obtained electrodes exhibits satisfactory Nernstian slopes. The electrodes were compared to blank membranes (without any ionophoric substances) for the first time. Selectivity coefficients of the studied electrodes towards several inorganic cations were calculated. The relative selectivity coefficient (RSC) was applied for evaluating the selectivity properties of H+-electrode using a mathematical equation. The electrodes were applied for the determination of different inorganic and organic acids.
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