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Potentiometric study of the nucleation of Cu2O after its formation from fehling solutions and reducing sugars

✍ Scribed by Christos G. Nanos; Constantina N. Konidari; Miltiades I. Karayannis

Book ID: 102182247
Publisher: John Wiley and Sons
Year: 1991
Tongue: English
Weight: 437 KB
Volume: 3
Category: Article
ISSN: 1040-0397
DOI: 10.1002/elan.1140030620

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✦ Synopsis

The oxidation of glucose by Fehling solution was followed by various solid-state ion-selective electrodes. The shape of the recorded potential vs. time transient curves at three different electrodes (Cu2+, Pb2+, and A g + / S 2 -) was explained on the basis of the known mechanisms of formation of precipitates, the growth of crystals, and adsorption/desorption phenomena. The curves are peculiar in shape, are very reproducible, and show three distinct parts. The potential changes of the electrodes are due to the consumption of OH-during the reaction, as well as to its adsorption and desorption on the Cu20 precipitate. The effects on the values of different curve parameters of the concentrations of glucose, OH-, and K,Na-tartrate, as well as the temperature, were studied.

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