Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 12, 1997
Previous Article Next Article

Potentiometric Investigations of Nickel, Iron and Cobalt Interferences in the Generation of Selenium Hydride by Sodium Tetrahydroborate(III)

Abstract

The products of the reactions of FeII, NiII and CoII with sodium tetrahydroborate(III), which interfere with the determination of selenium by hydride generation, were precipitated by different methods and investigated by potentiometric titration accompanied by monitoring of hydrogen evolution, direct current plasma atomic emission spectrometry and positive ion FAB mass spectrometry. Boron was found in the precipitates of NiII and CoII but not FeII obtained from the acid solutions under the conditions of hydride generation. Several sections on the potentiometric titration curves were found, which indicated the formation of several boride-like compounds with different compositions depending on the sequence of mixing reagents, pH, reactant concentrations and ratios, speed of mixing and the presence of oxygen. A hypothesis was formulated about the reduction of boronIII from sodium tetrahydroborate(III) to lower oxidation states of boron in boride-like species which is used to explain the properties of the potentiometric titration curves and the suppression of the selenium hydride signal in hydride generation.

Back to tab navigation

Article information


Analyst, 1997,122, 1559-1568
Article type
Paper

Potentiometric Investigations of Nickel, Iron and Cobalt Interferences in the Generation of Selenium Hydride by Sodium Tetrahydroborate(III)

E. Ługowska, Analyst, 1997, 122, 1559
DOI: 10.1039/A703732E

Social activity

Search articles by author

Spotlight

Advertisements