A modified method for the sequential determination of Po-210 and Pb-210 in Ca-rich material using liquid scintillation counting


ÖZDEN B. , VAASMA T., KİİSK M., TKACZYK A. H.

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, vol.311, no.1, pp.365-373, 2017 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 311 Issue: 1
  • Publication Date: 2017
  • Doi Number: 10.1007/s10967-016-4984-1
  • Title of Journal : JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
  • Page Numbers: pp.365-373

Abstract

This research describes methods for the sequential determination of Pb-210 and Po-210 activity concentrations in Ca-rich ash samples collected from oil shale-fired power plants in Estonia. The procedure involves digestion of Ca-rich ash samples in a microwave digestion system, radiochemical separation of Pb-210 and Po-210 and their measurements. All samples, blanks and standards were measured by liquid scintillation counting (Quantulus 1220). The method was tested using IAEA (International Atomic Energy Agency) RGU-1 and IAEA-444 reference materials. Spectral calibration/peak identification which included the optimization of alpha/beta discrimination system (pulse shape analyser), and recovery have been made by Po-209 and Pb-210 standard solutions.