Thorium and zirconium can be quantitatively precipitated by quinaldinic acid atph 2.7 and 3, respectively. As the precipitates are of nonstoichiometric composition they are to be ignited to oxides. By this reagent thorium can be quantitatively separated from arsenic (As3+), mercury (Hg2+), rare earths, manganese, magnesium and alkaline earths and zirconium from all the aforesaid ions excepting rare earths which contaminate to a slight extent.
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Erämetsä, O.: Suomen Kemistilehti 17 B, 30 (1944); cf. C. A. 7047 (1946).
Majumdar, A. K., and J. G. Sen Gupta: Z.analyt.Chem. 161, 104, 179, 181 (1958).
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Majumdar, A.K., Sen Gupta, J.G. Gravimetric determination of thorium and zirconium. Z. Anal. Chem. 162, 262–265 (1958). https://doi.org/10.1007/BF00448117
- Physical Chemistry
- Analytical Chemistry