Determination of 55Fe/58Fe and 59Fe/58Fe isotopic ratios in irradiated Na2/FeNO/CN/5/.2H2O by SSMS (spark source mass spectrometry)

Abstract

A procedure for the measurement of the isotopic composition of Fe in irradiated Na2/FeNO/CN/5/.2H20 samples by SSMS is described. Decomposition with K2 S2O7, followed by extraction of Fe was necessary to eliminate interferences in the mass spectra. A study of the remaining interferences showed that they were of organic origin from the residual MIBK used for the extraction. The order of magnitude of the 55Fe/58Fe and 59Fe/58Fe ratios was calculated.