| Description |
iii, 32 leaves : illustrations ; 29 cm |
| Summary |
"The fluorescence of uranium finds its greatest application in the so-called "bead test" which is a method of qualitative analysis. In the form of a bead, the uranium is in solid solution, and if the proper chemical solvent is used, the bead will fluoresce under ultraviolet radiation. In the systematic separation of the metallic elements, uranium is associated with the aluminum group in that it is not precipitated by hydrogen sulfide in 0.3 N H ion but is precipitated by ammonium hydroxide and ammonium sulfide. In the analytical scheme, uranium acts like beryllium. This process of detection is sometimes tedious and is not necessary if one resorts to the bead test. The bead test eliminates the "wet" methods of qualitative analysis which involves many precipitations and critical concentrations of various chemicals. The only basic materials needed are a burner, solvent compound, a nichrome wire, and a source of ultraviolet light. The experimental section of this paper is an attempt to find the effect of different solvents when fused with uranium, the use of cerima, tungsten and columbium as activators, and possible interference of the tests by other elements. Also a problem of great importance is the effect of both long and short wavelength ultraviolet radiation. The theoretical section deals with an analytical interpretation of two equations expressing the intensity of fluorescence as a function of concentration"--Introduction, leaf 1. |
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