Uranium(VI) was extracted between pH 2.5 to 6.0 from 0.01 mol dm−3 malonic acid on a column of silica gel with Amberlite LA-1 as the extractant. It was stripped from the column with 1–2 mol dm−3 of hydrochloric, sulfuric, and nitric acids. Uranium(VI) was separated from alkali, alkaline earths, manganese, iron, cobalt, nickel, zinc, yttrium, lanthanum, cerium in binary mixtures by exploiting the difference in the pH of formation of malonato complexes. Uranium was separated from zirconium, hafnium, thorium, scandium, and titanium by taking its advantage of stability of chloro or sulfato complexes. The method was tested for the standard reference rock samples.
A novel method was developed for the extraction chromatographic separation of beryllium from 0.01 M malonic acid at pH 5.5 with Aliquat 336s as the stationary phase. Various mineral acids were used as stripping agents. Useful separations of beryllium from molybdenum(Vl), zirconium, thorium and uranium(V1) in sulphate media and iron, uranium(V1) and thallium(lll) in chloride media were developed. Beryllium was also separated from other elements by selective extraction. The method was extended to the analysis of beryl.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.