Abstract

The determination of 0.01 ppm of thorium in 1 g of uranium ore by a combined ion exchange-spectrographic analysis is presented. Thorium is separated from the chemically complex ore solution by anion exchange in hydrochloric and nitric acid media and determined spectrographically using zirconium as the internal standard. The precision of the method expressed as a coefficient of variation is estimated to be ±6%.

Determination of thorium and uranium in solution by laser-induced breakdown spectrometry

Arnab Sarkar, Devanathan Alamelu, and Suresh Kumar Aggarwal
Appl. Opt. 47(31) G58-G64 (2008)

Reference lines in the optogalvanic spectra of uranium and thorium over the wavelength range 694–755 nm

W. DeGraffenreid and Craig J. Sansonetti
J. Opt. Soc. Am. B 19(7) 1711-1715 (2002)

Reference lines in the optogalvanic spectra of uranium and thorium in the wavelength range 422 to 462 nm

W. DeGraffenreid, Sarah C. Campbell, and Craig J. Sansonetti
J. Opt. Soc. Am. B 29(7) 1580-1583 (2012)

Reference lines for dye-laser wave-number calibration in the optogalvanic spectra of uranium and thorium

Craig J. Sansonetti and K.-H. Weber
J. Opt. Soc. Am. B 1(3) 361-365 (1984)

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)