Medical activated charcoal tablets as a cheap tool for passive monitoring of gaseous 131I activity in air of nuclear medicine departments

• Published in: Journal of radioanalytical and nuclear chemistry Vol. 318; no. 1; pp. 723 - 726
• Main Authors: Mróz, Tomasz, Brudecki, Kamil, Mietelski, Jerzy W., Bartyzel, Mirosław, Misiak, Ryszard, Kornas, Andrzej
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 2018; Springer Nature B.V
• Subjects: Activated carbon; Air sampling; Charcoal; Chemistry; Chemistry and Materials Science; Diagnostic Radiology; Hadrons; Heavy Ions; Inorganic Chemistry; Medicine; Monitoring; Nuclear Chemistry; Nuclear engineering; Nuclear medicine; Nuclear Physics; Nuclear safety; Physical Chemistry; Radioactivity; Sodium hydroxide; Tablets; Trapping; Passive monitoring; Nuclear medicine; Radioiodine; Gamma-ray spectrometry
• ISSN: 0236-5731; 1588-2780
• DOI: 10.1007/s10967-018-6107-7

It is well known that monitoring of radioactivity released from nuclear medicine departments is necessary to ensure the radiological safety of patients and personnel. Unfortunately, equipment for air sampling is often expensive, loud and is not suitable to use in hospitals. Our goal was to find cheap and simple system for passive monitoring of 131 I activity concentration in the air of nuclear medicine departments. Medical activated charcoal tablets were used, because charcoal is excellent material for 131 I trapping and tablets are readily available. Our proposed sampling protocol contains tablets preparation, exposure and measurements using HPGe detector. Different methods of tablets preparation (drying, impregnation with KI or NaOH) were tested while an experimental chamber was prepared for estimating 131 I (released from Na 131 I, similar to that used in therapy) trapping efficiency of tablets in different conditions. Finally, tablets were placed in plastic holders and tested in nuclear medicine facilities.