A rapid determination of Ra-226 in water using composite ion exchanger MnO2-PAN

作者：Dulanska Silvia^*; Gardonova Veronika; Sebesta Ferdinand; Matel Lubomir

来源：Journal of Radioanalytical and Nuclear Chemistry, 2015, 303(1): 47-51.

DOI：10.1007/s10967-014-3454-x

• Ra-226 separation
• Ra-226 determination
• Water samples
• MnO2-PAN composite ion exchanger

A rapid method for Ra-226 determination in water samples up to 10 L using MnO2-PAN (polyacrylonitrile) composite ion absorber was proposed and verified. Samples were traced with Ba-133 to monitor radium radiochemical recoveries which were in the range of (92-100) %. MnO2-PAN absorber with grain size < 0.1 mm with bed volume (BV) 2 mL was used for Ra-226 preconcentration from water samples (pH 6.5-7.0) at flow rate < 290 BV h(-1). Radium was eluted from the absorber with 20 mL of 6.5 M HCl at flow rate of 1.5 mL min(-1). Alpha-spectrometric counting of Ba(Ra)SO4 microprecipitate was used for Ra-226 determination. The developed method was used for the Ra-226 determination in 15 samples of natural mineral, mountain spring, drinking and natural healing waters from Slovakia, Slovenia and Czech Republic.

• 出版日期2015-1