Pkg. Manninen, A RAPID METHOD FOR URANIUM ISOTOPE RATIO MEASUREMENT BY INDUCTIVELY-COUPLED PLASMA-MASS SPECTROMETRY, Journal of radioanalytical and nuclear chemistry, 201(2), 1995, pp. 71-80
Uranium isotope ratio U 234/238 can be measured by commercial high-per
formance inductively coupled plasma mass spectrometry (ICP-MS) with go
od precision and accuracy (relative standard deviation RSD < 2%). The
method is based on acquiring the data using a peak jump mode and a col
lecting signal 10 times longer for low abundance isotopes. Uranium iso
tope standards U-005 to U-200 from the National Bureau of Standards (N
BS) were used for method development. The optimum uranium concentratio
n range for analysis for dissolved samples is from 50 to 200 mu g 1(-1
).