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  • Author or Editor: J. Sloof x
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Two methods are presented for a fast, accurate and precise determination of210Pb in industrial samples with a calcium-phosphate and-sulphate matrix. One method combinessolid-liquid extraction on a Pb-selective column Sr*Spec (Eichrom) with gamma-ray spectrometry of210Pb and can be applied to samples >10 g for aselective 210Pb determination. The yield is determined gravimetrically. The detection limit is 380 mBq for a 24 h counting period. The other method combineschromatography on Sr*Spec with liquid scintillation counting of210Pb for asensitive 210Pb determination and can be applied to samples of up to 1 g. The yield is determined on-line by the UV signal of PbEDTA. The detection limit is 70 mBq for a 2 h counting period. Aspects of accuracy, precision, selectivity, sensitivity and the application of both methods to phosphogypsum and phosphate ores are presented.

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