ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Determination of Arsenic and Antimony in High-Purity Phosphoric Acid by Atomic Absorption Spectrometry with Electrothermal Atomization

M. Fišera, Z. Hladký, and J. Ríšová

Department of Analytical Chemistry, Faculty of Chemical Technology, Slovak Technical University, SK-812 31 Bratislava

Abstract: An atomic absorption spectrometric method with electrothermal atomization (AAS-ETA) for the determination of arsenic and antimony in high-purity phosphoric acid is described. The determination is based on the rapid generation of arsine and stibine based on reduction with a solution of sodium tetrahydroborate, their absorption in a solution of nickel salt, nitric acid, and bromine, and is suitable for ng g^-1 levels of As and Sb in H₃PO₄ and other mineral acids.

Full paper in Portable Document Format: 501a8.pdf

Chemical Papers 50 (1) 8–11 (1996)