Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Extraction-spectrophotometric determination of uranium/VI/ with tropolone


Tropolone reacts with uranium/VI/ and forms orange yellow precipitate extractable in chloroform. The maximum absorption occurs at 405 nm and the absorbance is found to remain constant in the pH range of 5.5 to 7.0. Beer's law is obeyed upto 37.6 ppm of U/VI/. The sensitivity of the colour reaction is 0.034 μg cm−2. Most of the common ions do not interfere. The method becomes more selective by masking some of the interfering cations with EDTA. The method was applied to determine uranium in monazite sand.

This is a preview of subscription content, log in to check access.


  1. 1.

    G. H. Rizvi, B. P. Gupta, R. P. Singh,Anal. Chim. Acta, 54 /1971/ 295.

  2. 2.

    G. H. Rizvi, B. P. Gupta, R. P. Ringh,Microchim. Acta, [Wien], /1972/ 459.

  3. 3.

    G. H. Rizvi, R. P. Singh,Indian J. Chem., 10 /1972/ 882.

  4. 4.

    G. H. Rizvi, R. P. Singh,Talanta, 19 /1972/ 1198.

  5. 5.

    G. H. Rizvi,Microchim. Acta [Wien], /1983/ 21.

  6. 6.

    G. H. Rizvi,Afinidad, 391 /1984/ 280.

  7. 7.

    J. A. Perez-Bustamante, F. Palomares Delgade,Analyst, 96 /1971/ 407.

Download references

Author information

Additional information

This work is a part of the Ph.D. Thesis.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Rizvi, G.H. Extraction-spectrophotometric determination of uranium/VI/ with tropolone. Journal of Radioanalytical and Nuclear Chemistry Letters 106, 309–317 (1986).

Download citation


  • Colour
  • Physical Chemistry
  • EDTA
  • Inorganic Chemistry
  • Chloroform