|Detection by||alpha, beta||Description||
This method specifies the minimum requirements and laboratory methods for measuring 226Ra in seawater samples using alpha-spectrometry via its daughter 222Rn, and 228Ra using beta- counter via its daughter 228Ac.
Samples are concentrated by MnO2-fibers with flow rate less than 0.5 L/min. Then the MnO2– fibers are sealed in valve bag and stored for the determination of 226Ra. After the analysis of 226Ra, Ra isotopes on MnO2-fibers are eluted by 2 M HCl solution and co-precipitated for the determination of 228Ra.
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