IMPROVED IODOMETRIC METHOD FOR SIMULTANEOUS DETERMINATION OF NONSTOICHIOMETRIC OXYGEN AND TOTAL COPPER CONTENT IN YBCO SUPERCONDUCTORS

被引：5
|
作者：
NEDELTCHEVA, T [1 ]
SIMEONOVA, P [1 ]
LOVCHINOV, V [1 ]
机构：
[1] BULGARIAN ACAD SCI,INST SOLID STATE PHYS,BU-1784 SOFIA,BULGARIA
来源：
ANALYTICA CHIMICA ACTA | 1995年 / 312卷 / 02期
关键词：
POTENTIOMETRY; IODOMETRY; YBCO SUPERCONDUCTOR; OXYGEN; COPPER;
D O I：
10.1016/0003-2670(95)00238-U
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Some improvements with regard to the iodometric method for the determination of the total copper and non-stoichiometric oxygen (or Cu3+) content in YBa2Cu3Oy superconductors were made. A potentiometric end-point determination with Pt wire electrode was introduced, and a higher concentration of KI was used in order to avoid precipitation of CuI. The two ways for calculating the oxygen coefficient y and the possibility for detecting changes of the sample, with consequent differences in stoichiometry, were discussed.
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页码：227 / 229
页数：3
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