Determination of Uranium in Soil and Biological Material in Sudan by Laser Fluorimetry, and Comparison with y Spectrometric Results for Ra-226

Abstract

In this work some samples from the area around Miri Lake, a place of high natural radioactivity in Sudan, were analysed by laser fluorimetry for the determination of uranium concentration in soil and biological materials. Gram quantities of samples were ashed. The residue, after fuming with hydrofluoric acid, nitric acid, and perchloric acid, were taken up in a Ca(N0 3 ) 2 salting solution, and the uranium was extracted with methylisobutylketone (MIBK). After the stripping of uranium from MIBK solution into 0.001 Μ HN0 3 , it was measured with a laser fluorimeter type Scintrex UA-3. At present this technique has not yet been widely used in the field concerned [1, 2].

Study of natural radioactivity in Lake Miri in South West of Sudan

“…The results of this study agree with the study in Ref. [19] as the study area in that reference has high natural radioactivity and with the study in Ref. [20] as Jabal Alnar has high natural radioactivity.…”

Determination of Metals in Soils

“…Mukhtar et al 317 have described a laser fluorometric method for the determination of thorium (and uranium) in soils. Stream digestion has been employed in the preparation of soil samples for the determination of thorium (and uranium).…”

“…Other workers have reported the determination of uranium (and thorium) in soils. 317,320,321,324 Steam digestion has been employed in the preparation of soil samples for the determination of uranium (and thorium). 318 Parsa 316 described a sequential radiochemical method for the determination of uranium (and thorium) in soils.…”

“…325 Mukhtar et al 317 have described a laser fluorometric method for the determination of uranium (and thorium) in soils. To determine uranium (and thorium) in soils, fluorescent X-rays were measured by the use of a germanium planar detector and chromometric techniques.…”

Metals in Sediments

“…Mukhtar et al 104 have described a laser fluorometric method for the determination of uranium (and thorium) in nonsaline sediments.…”