Precision and Accuracy of the Determination of Uranium by Controlled-Potential Coulometry.

摘要

Improvements in the solution handling and the introduction of new computer controlled coulometers developed at Harwell have resulted in an improvement in the precision of the uranium coulometric method. Results obtained using NBS 960 and EC-101 uranium reference materials over a period of several months have shown that a precision of +- 0.060% (RSD) can be obtained and that the accuracy is within the precision limits of the method. The importance of chemically calibrating the coulometric equipment with reference materials, rather than relying on the electrical calibration of the coulometer itself, is demonstrated. (Atomindex citation 20:019709)