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- W2170265452 abstract "Poly(vinyl chloride) polymeric membrane sensors containing Sn(IV) phthalocyanine dichloride (SnPC) and Co(II) phthalocyanine (CoPC) as novel electroactive materials dispersed in o-nitrophenyl octylether (o-NPOE) as a plasticizer are examined potentiometrically with respect to their response toward selenite (SeO32−) ions. Fast Nernstian response for SeO32− ions over the concentration ranges 7.0×10−6–1.0×10−3 and 8.0×10−6–1.0×10−3 mol L−l at pH 3.5–8.5 with lower detection limit of 5.0×10−6 and 8.0×10−6 mol L−1 and calibration slopes of −25.4 and −29.7 mV decade−1 are obtained with SnPC and CoPC based membrane sensors, respectively. The proposed sensors reveals by the modified separate solution method (MSSM) a good selectivity over different anions which differ significantly from the classical Hofmeister series. A segmented sandwich membrane method is used to determine complex formation constants of the ionophores in situe in the solvent polymeric sensing membranes. Membrane incorporating CoPC in a tubular flow detector is used in a two channels flow injection set up for continuous monitoring of selenite at a frequency of ca. 50 samples h−1. Direct determination of selenium in pharmaceutical formulations and anodic slime gives results in good agreement with data obtained using standard ICP method." @default.
- W2170265452 created "2016-06-24" @default.
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- W2170265452 date "2008-05-01" @default.
- W2170265452 modified "2023-09-26" @default.
- W2170265452 title "Development of a Novel Automatic Potentiometric System for Determination of Selenium and Its Application in Pharmaceutical Formulations and Anodic Slime" @default.
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- W2170265452 doi "https://doi.org/10.1002/elan.200704138" @default.
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