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1349089 
Journal Article 
The determination of uranium by spectrophotometric method with Arsenazo III 
Lazo, P; Cullaj, A; Dogjani, S 
2000 
1 
Fresenius Environmental Bulletin
ISSN: 1018-4619
EISSN: 1610-2304 
9 
3-4 
209-216 
English 
WOS:000086353400012 
Uranium is separated and preconcentrated from interfering
elements by liquid extraction with 20% tributylphosphate (TBP) in benzene solution, prior to
spectrophotometric determination with Arsenate III in HCl milieu (pH=2.5), stabilized by buffer
solution. Sodium fluoride and EDTA are used to complex calcium, rare earth elements (RE) and iron
because they interfere in uranium determination. The method is applicable in sediments and soil
samples with concentrations in the range of 0.25 - 10.0 mu g of U/L. It could be used for 20 to
50 ml water samples, too at concentrations up to 0.25 mu g of U/L. 
uranium; Arsenazo III; spectrophotometry UV-VIS; chemical analysis; soil samples