Alternative quality control for technetium-99m IDA complexes

Area of Science:

• Nuclear medicine
• Radiopharmaceutical chemistry
• Analytical chemistry

Background:

• Quality control of radiopharmaceuticals is crucial for accurate diagnostic imaging.
• Technetium-99m labeled IDA complexes are widely used in hepatobiliary imaging.
• Existing quality control methods can be time-consuming or require specific expertise.

Purpose of the Study:

• To develop and validate a novel quality control procedure for 99mTc-IDA complexes.
• To evaluate the efficacy of C18 Sep-pak cartridges for radiochemical purity assessment.
• To compare the Sep-pak method with a standard chromatographic technique.

Main Methods:

• Development of a quality control procedure utilizing C18 Sep-pak cartridges.
• Pretreatment of cartridges with 95% ethanol and 10(-3) N hydrochloric acid.
• Application, washing, and elution of 99mTc-IDA complexes using specific solvents.
• Validation by comparing results with a standard two-strip chromatography method (ITLC-SG/methanol and ITLC-SA/saline).

Main Results:

• Successful development and validation of the C18 Sep-pak cartridge-based quality control procedure.
• Demonstrated comparability of radiochemical purity values for 99mTc-mebrofenin and 99mTc-disofenin.
• The Sep-pak method yielded comparable results to the established ITLC method.

Conclusions:

• The C18 Sep-pak cartridge procedure offers a reliable and effective method for quality control of 99mTc-IDA complexes.
• This method provides an alternative or complementary approach to existing quality control techniques.
• The validated procedure ensures the quality and safety of radiopharmaceuticals for clinical use.