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

Atomic-emission spectral analysis of niobium and tantalum in carbon and silicon dioxide matrixes

R. Rautschke, O. Kononowa, and P. Munzert

Martin-Luther-Universität Halle-Wittenberg, Sektion Chemie, 4020 Halle/S., DDR

Abstract:  Spectrochemical determination of niobium and tantalum in geochemical samples and technical materials is often impeded by formation of nonvolatile compounds which arise in the course of excitation by direct current arc. By addition of suitable thermochemical reagents the formation of such compounds, especially of carbides, can be suppressed, which affects favourably the limits of detection for niobium and tantalum. Analyses for these two elements were run in C- and SiO₂-matrix and as thermochemical reagents the compounds LiF, LiF + AgNO₃ , Ga₂O₃ , Cr₂O₃ ,GeO₂ , AgNO₃, and AgNO₃ + С were used. From among those LiF added to a C-matrix and AgNO₃ + С added to a SiO₂-matrix produced the desired effect.

Full paper in Portable Document Format: 362a201.pdf (in German)

Chemical Papers 36 (2) 201–206 (1982)