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A short routine direct fluorimetric p~ocedure for the determination of up to 0.06 percent uraniwn in os:phate rocks is described. The procedure employs a simple ac d leach for preparing the solution, and the uraniwn is determine~ directly on a 1..8-mg aliquot. The results obtained by using th~s simple procedure pn several thou.sand S8JJJ;Ples are discussed. · . e quenching of the uranfor all practieal purposes, and results on wes ern phosphates may be corrected by using an empirically determin d quenching factor.

Short routine direct method for the fluorimetric determination of uranium in phosphate rocks