FLUOROMETRIC DETERMINATION OF SUBMICROGRAM QUANTITIES OF THORIUM
A fluorometric method using morin in an alkaline solu tion of diethylenetriaminepentaacetic acid was developed that has a detection limit of 0.01 mu g of thorium and a precision to about 0.5% on 5 mu g both at the 95% confidence level. Reliability and precision are achieved through use of a buffer system, an internal acid-base indicator, a permanent glass standard of fluorescence, and high concentrations of several different complexing agents. The fluorescent species contains thorium and morin in a mole ratio of 1 to 1. &cause of its high sensitivity and tolerance to most of the common elements, the procedure is particularly applicable to the determination of thorium in air and water at concentrations well below the maximum permissible levels and in thorium ores and rare earths without separations of any kind. Even with siliceous materials, a determination can be completed in less than 1 hour. (auth)
- Research Organization:
- Health and Safety Div., AEC, Idaho Falls, Idaho
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-16-022026
- OSTI ID:
- 4815215
- Journal Information:
- Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed., Journal Name: Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed. Vol. Vol: 34; ISSN ANCHA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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