Ion exchange chromatography is extremely well suited for the complete or partial separation of trace and ultra‐trace elements from rooks and minerals. Selective methods are described for the separation of traces of lithium, beryllium, vanadium, uranium, strontium, barium, sodium, potassium and rare earth elements, and their determination in rook samples. The methods are especially useful for accurate standardization work. Some typical elution curves and results for the concentration of these trace elements in the six South African NIM‐rock standards and some international standard rocks are presented.
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Strelow et al. (1978) studied this question.
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