Potentiometric coulometry using a liquid-film-modified electrode as a reversible surface-confined system
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چکیده
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COBALT PHTHALOCYANINE MODIFIED CARBON PASTE ELECTRODE AS A POTENTIOMETRIC SENSOR FOR DETERMINATION OF ASCORBIC ACID
A carbon Paste electrode modified with cobalt (II) phthalocyanine (CoPC) was used as a sensitive potentiometric sensor for determination of ascorbic acid in aqueous solutions. The potential response of the electrode is a linear function of ascorbic acid concentration over the range 5 10 to 10 M (?1- 1800 µg ML ) with a Nernstian slope of 56 mV at pH 7. The limit of detection was 0.2 µg ...
متن کاملcobalt phthalocyanine modified carbon paste electrode as a potentiometric sensor for determination of ascorbic acid
a carbon paste electrode modified with cobalt (ii) phthalocyanine (copc) was used as a sensitive potentiometric sensor for determination of ascorbic acid in aqueous solutions. the potential response of the electrode is a linear function of ascorbic acid concentration over the range 5 10 to 10 m (?1- 1800 µg ml ) with a nernstian slope of 56 mv at ph 7. the limit of detection was 0.2 µg ml ascor...
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Abstract: In this study, we were investigated behavior the electrochemical reductionof nitrite at a hemoglobin (Hb) immobilized on glass carbon electrode (GCE) containingpolypyrol nanofiber (ppy) films. Polypyrrole (PPy) nanofibers have been constructed onGCE applying electrochemical technique, and can to deposit diverse polymers onminiaturized electrodes with this commo...
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15 صفحه اولPotentiometric determination of trace amounts of amantadine using a modified carbon-paste electrode.
A chemically modified carbon-paste electrode has been described for the sensitive and selective determination of amantadine. Beta-cyclodextrin was used as modifier. The electrode shows a sub-Nernstian response of 51.0 +/- 1.0 mV decade(-1) for amantadine in the concentration range of 6.3 x 10(-10)-7.1 x 10(-7) M at 25 degrees C. The optimum pH value was maintained at 4.5 using a 0.02 M acetate ...
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ژورنال
عنوان ژورنال: Journal of Electroanalytical Chemistry
سال: 2016
ISSN: 1572-6657
DOI: 10.1016/j.jelechem.2016.09.002