Spectrophotometric determination of uranium in sea water with thiocyanate and rhodamine B |
| |
Authors: | I López García M Hernández Córdoba C Sánchez-Pedreño |
| |
Institution: | (1) Department of Analytical Chemistry, Faculty of Chemistry, University of Murcia, Murcia, Spain |
| |
Abstract: | Summary
Spectrophotometric Determination of Uranium in Sea-Water with Thiocyanate and Rhodamine B
In the presence of a large excess of thiocyanate uranium(VI) forms a violet colour with Rhodamine B. The complex can be stabilized by addition of poly (vinyl alcohol). The calibration graph for measurement at 600 nm is linear in the range 0.5–10 g of uranium per 25ml, the molar absorptivity being 3.56×1051-mole–1·cm–1. The effect of foreign ions has been studied and the method can be applied to the determination of uranium in sea-water, with reliable results. Uranium is preconcentrated from sea-water by a flotation procedure with toluene in presence of benzoate and Safranine T, with nitrilotriacetic acid as masking agent. The method is highly selective for uranium, with a recovery of 97.9–99.2%. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|