Method for pretreatment of biological sample for radionuclide measurement using gamma-spectroscopy

A method for pretreatment of a biological sample for radionuclide measurement using gamma-spectroscopy, comprising the following steps:

• (1) subjecting the biological sample to washing, air-drying for surface water removal, and weighing to obtain a clean and dry sample, and grinding and pulping the clean and dry sample or cutting the clean and dry sample into sections to obtain a sample pulp or sample sections;
• (2) quick-freezing:
• spraying the sample pulp or sample sections with liquid nitrogen for quick-freezing to obtain a frozen sample;
• (3) lyophilization:
• transferring the frozen sample into a vacuum lyophilizer, vacuuming at a temperature of −30° C. or lower, and lyophilizing the frozen sample to obtain a lyophilized sample;
• (4) collecting, weighing, grinding, and sieving the lyophilized sample to obtain a biological lyophilized powder;
• and
• (5) filling the biological lyophilized powder into a weighed sample box, tamping or compacting, sealing, and weighing to obtain a to-be-measured sample for the radionuclide measurement using gamma-spectroscopy.