Rapid Separation and Precise Determination of Strontium Isotopic from Geological Samples with High Rubidium/Strontium Ratios

In this study, the conventional two-stage separation process was optimized, and an experimental method for rapid separation of Sr from geological samples with high Rb/Sr ratios was established. In this method, the Sr solution after purified by AG50 resin was directly added to a new AG50 resin to purify Rb and Sr again. The whole separation process would be accomplished quickly and efficiently. The method combined with highly sensitive thermal ionization mass spectrometer (TIMS) technique was completely satisfied in high precision determination of 87Sr/86Sr isotope ratio in the samples with high Rb/Sr ratios. Through the application of the novel separation method with a large number of geological samples with high Rb/Sr ratios, it was proved that the experimental process was stable and reliable and showed crucial application value.Graphical abstractThe continuous separation procedure for separation of Sr from geological samples with high Rb/Sr ratios using AG50 resin was established. The method combined with highly sensitive thermal ionization mass spectrometer (TIMS) analytical technique was completely satisfied in high precision determination of Sr isotope.
Source: Chinese Journal of Analytical Chemistry - Category: Chemistry Source Type: research