Extraction of technetium-99 by complexation with ammonium tetramethylenedithiocarbamate into chloroform and its application to the determination of technetium-99 in low-level radioactive wastes
✍ Scribed by Jih-Hung Chiu; Tieh-Chi Chu; Pao-Shan Weng
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 617 KB
- Volume
- 256
- Category
- Article
- ISSN
- 0003-2670
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✦ Synopsis
A feasltuhty study concernmg the extractron of carrier-free 99mTc0; from HCI solution by chelatmg with ammomum tetramethylenechthlocarbamate (ammomum pyrrohdmedlthlocarbamate, APDQ into chloroform was carried out ExtractIon parameters such as the effect of a&@ m the aqueous phase on the extractIon efficiency, concentration of APDC, shalong time, volume ratlo of the aqueous to the orgamc solutlons, back-extractlon, electruzal charge study of 99mTc eon m &lute HCI, hpopluhclty and the stabdlty of the complex and the extractlon of numerous mterfermg radlonuchdes were studled The ophmum condltlons found were apphed m the development of a procedure for the determmatlon of 99Tc m low-level radtoactwe wastes Usmg 99mT~ as an Internal tracer for the evaluation, the recoveries of %Tc m the various types of low-level radIoactIve waste samples were tugher than 90% The extractlon factors for most of the accompanymg rachonuchdes were lugher than 10' The detectlon hmlt for 99Tc m a sample of 0 005 kg IS 4 2 Bq kg-' (0 11 ~CI g-') for a 100~nun countmg Interval