Three calibration techniques combined with sample-effective design of experiment based on Latin hypercube sampling for direct detection of lanthanides in REE-rich ores using TXRF and WDXRF

We compared multivariate and univariate models for simultaneous detection of Ce, La, Nd, Pr, Sm in ores and nodules using TXRF and WDXRF. DoE based on Latin hypercube sampling provided a low correlation between the content of REEs in calibration set.