Research Article

2-Hydroxy-1-naphthaldehyde-P-hydroxybenzoichydrazone: A New Chromogenic Reagent for the Determination of Thorium(IV) and Uranium(VI)

Table 13

Simultaneous determination of uranium and thorium in ore samples.

Ore sample (composition)Amount of metal ion (ppm)  Relative error
CertifiedFound  
U(VI)Th(IV)U(VI)Th(IV)U(VI)Th(IV)

20283 MALINIM-G (Granite), (ppm)
Eu(0.35), F(4200), Ga(27), Gd(14), Hf(12), Li(12), Lu(2), Mo(3), Nb(53), d(22), Tb(3), U(15), V(2), Yb(14.2), Zn(50), Zr(300)
155114.8552.68−0.01 0.032

20283 MALINIM-L (Lujavrite), (ppm)
Eu(1.2), F(4400), Ga(54), f(190), Li(48), Lu(0.4), Mo(4), Nb(960), Nd(22), Tb(0.7), U(14), V(81), Yb(3), Zn(400)
146614.4664.68 0.03 −0.02