Reagents, test solutions and volumetric solutions: U - Uracil R.... Urea R
Uracil R Pyrimidine-2,4(1H,3H)-dione; C4H4N2O2.
A commercially available reagent of suitable grade.
Uranyl acetate R
C4H6O6U,2H2O (SRIP, 1963, p. 213).
Uranyl/zinc acetate TS
Procedure. Dissolve 10 g of uranyl acetate R by heating with 50 mL of water and 5 mL of acetic acid (~300 g/L) TS; dissolve 30 g of zinc acetate R by heating with 30 mL of water and 3 mL of acetic acid (~300 g/L) TS. Mix the two solutions, allow to cool to room temperature and remove by filtration any solid material that separates.
Urea R
CH4N2O (SRIP, 1963, p. 214).
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