Analytical Sciences
Online ISSN : 1348-2246
Print ISSN : 0910-6340
ISSN-L : 0910-6340
CHEMICAL ANALYSIS OF OXIDATION STATE OF COPPER OR OXYGEN AND ITS DISTRIBUTION IN SUPERCONDUCTING La-Sr-Cu OXIDE
YUJI SASAKIHISAO AOYAGIHIDEYO TAKEISHIZENKO YOSHIDA
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1991 Volume 7 Issue Supple Pages 1201-1204

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Abstract

A new method for the determination of (CuO)+/Cutotal in the superconducting La2-XSrXCuOy was developed, which is based on the continuous dissolution of the sample pellet in a flowing solution of Fe2+, and the flow-coulometric detections of Fe3+ generated through the stoichiometric redox reaction of (CuO)+ with Fe2+ and the total Cu2+ dissolved. The (CuO)+/Cutotal ratio down to 0.0003 in the bulk of the sample as well as the distribution of the ratio from surface to inside of the pellet can be determined.

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© The Japan Society for Analytical Chemistry
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