Abstract

A comparison is made of the precision and accuracy of the conventional WO₃-gravimetric inductively coupled plasma atomic emission (ICP-AES) determination of macro amounts of tungsten in tungsten ores, concentrates, and alloys. Pure tungsten powders are readily dissolved in hydrogen peroxide. Samples having a complex mineralogical and metallurgical composition are conveniently dissolved by fusion with sodium peroxide and the solution stabilized with the employment of phosphoric acid. For ICP-AES analysis, the use of Sc(II) 361.384 as an internal standard reduces short-term variability by a factor of three, producing data that compare favorably with those obtained by the classical cinchonine-tungstic acid procedure and with those quoted in the literature for NBS 277.

Optimized laser-induced breakdown spectroscopy for determination of xenobiotic silver in monosodium glutamate and its verification using ICP-AES

I. Rehan, M. A. Gondal, and K. Rehan
Appl. Opt. 57(12) 3191-3197 (2018)

Spectrochemical Determination of Lead, Cadmium, and Zinc in Dusts, Fumes, and Ores1

H. I. Oshry, J. W. Ballard, and H. H. Schrenk
J. Opt. Soc. Am. 31(10) 627-633 (1941)

Quantitative determination of tantalum and niobium in tantalum–niobium ore using laser-induced breakdown spectroscopy

Li Liu and Zhongqi Hao
Appl. Opt. 58(2) 461-465 (2019)

The Spectrochemical Analysis of Nickel Alloys*

Edwin K. Jaycox
J. Opt. Soc. Am. 37(3) 159-162 (1947)

The Spectrochemical Analysis of Copper Base Alloys*

Edwin K. Jaycox
J. Opt. Soc. Am. 35(2) 175-179 (1945)