Abstract: A rapid analysis method of Lead-210 in soil sample was established by using solid phase extraction and liquid scintillation counting method. The lead in soil sample was enriched by concentrated nitric acid heating extraction method. The lead specific resin was used as an adsorbent, and citric acid solution was used for desorption. The chemical recovery rate of lead was measured by ICP-AES and the activity concentration of Lead-210 was measured by liquid scintillation spectrometer. When the amount of soil sample was 1.0 g and the measuring time was 60 minutes, the minimum detectable concentration of this method was 24.8 Bq/kg and the precision of this method was 4.8%, and the recovery rate of this method was 100.1%-102.6%, which met the requirement of Lead-210 analysis in soil sample.

Key words: solid phase extraction, liquid scintillation counting, soil sample, Lead-210