COMPARATIVE-STUDY OF DIFFERENT CHROMATOGRAPHIC METHODS FOR QUALITY-CONTROL OF IN-113M RADIOPHARMACEUTICALS

Paper chromalography and Gel Chromalography Column Scanning technique (GCS) have been applied for the separation of indium fractions in In-113m-radiopharmaceuticals. By these techniques the percentage of ionic indium, In-113m-colloid and In-113m- compound have been determined. The resolution efficiency of the gels was found to be significantly influenced by the gel type media and the pH of the eluent. The results obtained from the GCS-profiles indicated that the Sephadex G-50 Fine was the best and can be routinely used in the radiochemical quality control of the In-113m-phytat. Good separation of In-113m-colloids, In-133m-microaggregate and In-113m from carrier-free In-113m-eluate was performed using Whatman No. 3, previously washed with 0.04N HCl and developed either with 0.9% NaCl (for In-113m-colloid), or 85% methanol (for In-113m-phytate), or phosphate-methanol buffer (for In-113m-microaggregate) as rapid and simple procedure for determination of the radiochemical quality control of indium compound in the forms of radiocolloids.