Determination of Sub-Trace Sc, Y and Ln in Carbonate by ICP-MS with Inter-Element Matrix-Matched Technique

摘要

A simple method for the determination of Sc, Y and Ln in carbonate at sub μg·g -1 levels by ICP MS with inter elements matrix matched technique was developed. A series of matrix matched standard solution were prepared by adopting the normalized concentration values, which were calculated the statistic average compositions of reference values of REEs in carbonate standard reference materials. The matrix effects of Ca and Mg on REEs were studied in detail and the results show that the matrix effect of Ca and Mg can be ignored when the dilution factors are more than 1000. The combination of 115 In and 103 Rh as internal standard was selected to compensate the drift of analytical signals. The method proposed was applied to the analysis of ultra trace REEs in carbonate references materials GSR 6, GSR 12 and real samples.