Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl

PL EN


Preferences help
enabled [disable] Abstract
Number of results

Journal

2013 | 11 | 3 | 381-387

Article title

Spectrophotometric method for rapid estimation of the oxygen stoichiometry in YBCO superconducting samples

Content

Title variants

Languages of publication

EN

Abstracts

EN
Abstract Detailed investigations on the possibility for determination of the oxygen stoichiometry in YBa2Cu3Oy superconducting samples by measuring the absorbance of the colored Co(III)-EDTA and Cu(II)-EDTA complexes in one solution have been performed. The absorptivity of the complexes at pH 2.5 and 4.9 as well as Beer’s law have been studied. The content of the solution for the sample dissolving has been established. The stoichiometry of the oxidation-reduction reaction between Cu(III) from the sample and Co(II) in the solution has been proved. The possibility to dissolve the sample in air has been tested. As a result a simple and rapid spectrophotometric method for the determination of the δ non-stoichiometric oxygen coefficient in YBa2Cu3O6.5+δ samples has been developed without precise measurement of the sample mass. The standard deviation of the δ- and y-coefficient results is 0.017. The reproducibility of the y-values in relative units (sr ) is 0.2%. The accuracy of the results has been confirmed by the method, which is based on the absorbance measurement of the I 3−-starch compound. Graphical abstract [...]

Publisher

Journal

Year

Volume

11

Issue

3

Pages

381-387

Physical description

Dates

published
1 - 3 - 2013
online
28 - 12 - 2012

Contributors

  • Department of Analytical Chemistry, University of Chemical Technology and Metallurgy, 1756, Sofia, Bulgaria
  • Department of Analytical Chemistry, University of Chemical Technology and Metallurgy, 1756, Sofia, Bulgaria
  • Department of Analytical Chemistry, University of Chemical Technology and Metallurgy, 1756, Sofia, Bulgaria
  • Institute of Solid State Physics, Bulgarian Academy of Sciences, 1784, Sofia, Bulgaria

References

  • [1] D.C. Harris, T.A. Hewsion, J. Solid State Chem. 182, 69 (1987) [Crossref]
  • [2] A.I. Nazzal, V.Y. Lee, Physica C 1367, 153 (1988)
  • [3] H. Vlamenick, H.H. Goossens, R. Mouton, S. Hoste, G. Van der Kelen, J. Mater. Chem 1, 863 (1991) http://dx.doi.org/10.1039/jm9910100863[Crossref]
  • [4] T. Nedelcheva, A. Stoyanova-Ivanova, L. Kostadinova, I. Ivanova, Fresenius J. Anal. Chem. 196, 342 (1992) [Crossref]
  • [5] A. Knizhnik, Y. Direktovich, D. Goldschmidt, Y. Eckstein, Supercond. Sci.Technol. 6, 209 (1993) http://dx.doi.org/10.1088/0953-2048/6/3/009[Crossref]
  • [6] W.M. Chen, J. Chen, X. Jin, Physica C 132, 276 (1997)
  • [7] T. Nedeltcheva, P. Simeonova, V. Lovchinov, Anal. Chim. Acta 312, 227 (1995) http://dx.doi.org/10.1016/0003-2670(95)00238-U[Crossref]
  • [8] R. Chavdarova, T. Nedeltcheva, L. Vladimirova, Anal. Chim. Acta 353, 325 (1997) http://dx.doi.org/10.1016/S0003-2670(97)87793-8[Crossref]
  • [9] Y. Yasukawa, H. Yamauchi, M. Karppinen, Appl. Phys. Lett. 81, 502 (2002) http://dx.doi.org/10.1063/1.1490146[Crossref]
  • [10] F. Sato, M. Fujihara, S. Kambe, O. Ishii, Physica C 445–448, 102 (2006) http://dx.doi.org/10.1016/j.physc.2006.03.088[Crossref]
  • [11] T. Nedelcheva, L. Vladimirova, Anal. Chim. Acta. 437, 259 (2001) http://dx.doi.org/10.1016/S0003-2670(01)01002-9[Crossref]
  • [12] A. Stoyanova-Ivanova, T. Nedeltcheva, L. Vladimirova, Cent. Eur. J. Chem. 3, 432 (2005) http://dx.doi.org/10.2478/BF02479273[Crossref]
  • [13] T. Nedeltcheva, L. Kostadinova, P. Simeonov, V. Lovchinov, Anal. Chim. Acta 336, 223 (1996) http://dx.doi.org/10.1016/S0003-2670(96)00381-9[Crossref]
  • [14] T. Nedeltcheva, Anal. Chim. Acta 312, 223 (1995) http://dx.doi.org/10.1016/0003-2670(95)00237-T[Crossref]
  • [15] T.K. Nedeltcheva, St. Iv. Georgieva, L.K. Vladimirova, A.K. Stoyanova-Ivanova, Talanta 77(5), 1745 (2009) http://dx.doi.org/10.1016/j.talanta.2008.10.019[Crossref]
  • [16] R.P. Pantaler, N.B. Lebed, Sverkhprovodimost, Fiz. Khim. Tekh. 2(10), 17 (1989) (In Russian)
  • [17] Z. Malkova, J. Novak, V. Haplova, Z. Pokorna, Fresenius J. Anal. Chem. 347 (1993)
  • [18] J.I. Hoppé, M.A. Malati, J. Chem. Educ. 82(2), 299 (2005) http://dx.doi.org/10.1021/ed082p299[Crossref]
  • [19] I.A. Incedii, Primenenie kompleksov v analiticheskoi himii (Mir, Moscow, 1979) (In Russian)
  • [20] St. Georgieva, T. Nedeltcheva, JUCTM 47(1), 91 (2012)
  • [21] K. Doerffel, Statistic in analytical chemistry (Mir, Moscow, 1969)

Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.-psjd-doi-10_2478_s11532-012-0172-5
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.