Precise determination of femtogram quantities of radium by thermal ionization mass spectrometry

Cohen, Anthony S. and O'Nions, R. Keith (1991). Precise determination of femtogram quantities of radium by thermal ionization mass spectrometry. Analytical Chemistry, 63(23) pp. 2705–2708.

DOI: https://doi.org/10.1021/ac00023a008

Abstract

Femtogram quantities of ²²⁶Ra (~ 3 x 10⁶) atoms, or 4 x 10^-5 Bq) have been determined in environmental materials, including seawater, mineral samples, and silicate rocks, by thermal ionization mass spectrometry. Chemical separation techniques suitable for all these materials are described here. Overall, these techniques enable the abundance of ²²⁶Ra to be determined in samples of both seawater and silicates which are some 10³ times smaller than those required by conventional radioactive counting methods.

Viewing alternatives

Metrics

Item Actions

Export

You can export this page using these formats Digital Object Identifier - DOI