English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

In this paper, a method for determination of tantalum in ores by direct potentiometry using an ion selective membrane electrode sensitive to the ion TaF 6 has been proposed. After checking the Nernstian behavior of the electrode in the presence of TaF 6 , the influence of NbF 6 concentration on the determination of tantalum was also investigated. Potentiometric measurements on synthetic solutions of TaF 6 in the concentration range from 10 -3 to 10 -5 mol.l -1 were performed in the presence of 10 -3 mol.l -1 of NbF 6 as interferering ions. From the results recorded, it appeared that the response of the electrode deviate to the Nernstian behavior when TaF 6 concentration is less or equal to 5×10 -5 mol.l -1 corresponding to a concentration of NbF 6 at least twenty times greater than that of TaF 6 . Using the standard addition method, it was observed that the ion NbF 6 is no longer interferering with TaF 6 on the entire range of concentration of TaF 6 investigated. The accuracy of the method conducted on a series of potentiometric measurements was about 1%. The technique developed has then been applied to the determination of tantalum in samples of Colombo-tantalite from various region of Rwanda.

Potentiometric determination of Tantalum content in ores using an ion selective membrane electrode