Quality control of the unsealed radioactive preparations includes the determination of the following quality parameters:

• radionuclidic purity (detection and quantity determination of the contaminating radionuclides),

• radiochemical purity (detection and quantity determination of radionuclides found in another chemical form as that of the product),

• control of radioactive concentration,

• control of the pH of the solution,

• checking microbiological purity.

The most frequently applied quality control methods of the unsealed radioactive preparations are summarized in Table 8.17. The quality parameters of the unsealed radioactive preparations are determined on samples taken from the bulk solution. Microbiological control tests are carried out as retrospective tests after decay.