QUANTITATIVE DETERMINATION OF AN EXTREMELY MINUTE QUANTITY OF RADIOACTIVE IODINE SEPARATED FROM RADIOACTIVE SODIUM AEROSOL

摘要

1486476 Determination of minute quantities of iodine JAPAN ATOMIC ENERGY RESEARCH INSTITUTE 30 Oct 1974 [31 Oct 1973] 46905/74 Heading G1B A method for determining an extremely minute quantity of radio-active iodine in a aerosol of radio-active sodium comprises flowing through arc discharge tube 1, air and an aerosol of radio-active sodium contaminated with an extremely minute quantity of radio-active iodine, to gasify the aerosol and associate the gaseous product, the gas stream then flowing through cooling means 2 where the sodium forms particulate sodium compounds and the iodine forms gaseous compounds which are not reactive with the sodium compounds, collecting the particulate sodium compounds on dust-catching filter 4 which may be of cellulose-asbestos and collecting the gaseous iodine on active carbonimpregnated filter paper 6, and quantitatively determining the radio-activities of the collected sodium and iodine using means 7, 8, for example G-M counters or scintillation detectors 7 and rate meters 8.