This document specifies test methods for rubidium and cesium in brines. This document applies to the determination of rubidium and cesium in brine. The method detection limit, quantification limit, and upper limit of determination are shown in Table 1. If the determination range exceeds the determination limit, it can be measured after appropriate dilution. Table 1 Selected isotopes, internal standards, method detection limits, and upper limits of determination Element internal standard method detection limit ug/L Quantitation limit ug/L Upper limit of determination mg/L 85Rb 103Rh 0.0022 0.022 20.00 133Cs 103Rh 0.0031 0.031 20.00
T/QAS 070-2021 history
2021T/QAS 070-2021 Determination of Rubidium and Cesium in Brine Inductively Coupled Plasma Mass Spectrometry