Related Experiment Video
Updated: Jun 28, 2026

Separation of Uranium and Thorium for 230Th-U Dating of Submarine Hydrothermal Sulfides
Published on: May 20, 2019
Separation and spectrophotometric determination of uranium(VI) by extraction with tri-n-octylphosphine oxide and
Y Shigetomi1, T Kojima, H Kamba
1Department of Chemistry, Okayama College of Science, 1-1, Ridai-chō, Okayama-shi 700, Japan.
Abstract:
Uranium(VI) is separated by extraction from nitric acid medium into a molten mixture of tri-n-octylphosphine oxide and benzophenone at about 50 degrees . The organic phase solidifies on cooling and is separated and dissolved in ethanol. The uranium(VI) in this solution is then determined spectrophotometrically with 1-(2-pyridylazo)-2-naphthol.
Related Concept Videos
Extraction: Advanced Methods
UV–Vis Spectrometers
Microbial Bioremediation of Uranium
Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview

