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Chloride‐Selective Electrodes with Poly( n ‐butyl acrylate) Based Membranes
Author(s) -
Lyczewska Monika,
Wojciechowski Marcin,
Bulska Ewa,
Hall Elizabeth A. H.,
Maksymiuk Krzysztof,
Michalska Agata
Publication year - 2007
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200603721
Subject(s) - membrane , vinyl chloride , acrylate , chemistry , chloride , detection limit , polyvinyl chloride , inorganic chemistry , chlorine , plasticizer , analytical chemistry (journal) , chromatography , polymer , organic chemistry , copolymer , biochemistry
Abstract Chloride‐selective electrodes with tridodecylmethylammonium chloride ion‐exchanger and poly( n ‐butyl acrylate) membrane were prepared. A significant advantage of these electrodes, compared to poly(vinyl chloride) based membranes is the lack of plasticizer which can contaminate samples due to leaching during long term measurements. Analytical parameters: linear response range, slope of dependence and detection limit were comparable to those characterizing poly(vinyl chloride) membrane sensors. However, the analytical characteristic of poly( n ‐butyl acrylate) membrane sensors was largely independent of the ion‐exchanger content in the membrane and of the galvanostatic polarization applied. The selectivity pattern obtained showed that interferences for highly lipophilic anions were slightly more pronounced than for PVC membrane counterparts. Laser ablation with inductively coupled plasma mass spectrometry (LA‐ICP‐MS) studies of poly( n ‐butyl acrylate) membranes free from tridodecylmethylammonium chloride revealed a relatively high background content of chlorine – comparable with the amount purposely introduced to the membrane containing ion‐exchanger. These impurities, regardless their chemical state, are affecting the response of the sensors obtained. The LA‐ICP‐MS data showed that while contact with Cl − containing solutions did not induce the coextraction of cations, salicylate interference is accompanied by high uptake of solution cations.