Simultaneous determination of uranium and thorium with Arsenazo III by second-derivative spectrophotometry
1990; Elsevier BV; Volume: 37; Issue: 6 Linguagem: Inglês
10.1016/0039-9140(90)80205-t
ISSN1873-3573
Autores Tópico(s)Electrochemical Analysis and Applications
ResumoA derivative spectrophotometric method has been developed for the simultaneous determination of microgram quantities of uranium and thorium with Arsenazo III in hydrochloric acid medium. The second-derivative absorbances of the uranium and thorium Arsenazo III complexes at 679.5 and 684.4 nm are used for their quantification. Uranium and thorium, both in the range 0.1–0.7 μg/ml have been determined simultaneously with good precision. The procedure does not require separation of uranium and thorium, and allows the determination of both metals in the presence of alkaline-earth metals and zirconium, but lanthanides interfere.
Referência(s)