ﻫﺴﺘﻪ ﻓﻨﻮﻥ ﻭ ﻋﻠﻮﻡ ﻣﺠﻠﻪ ﺍﻱJ. of Nuclear Sci. and Tech. ﺷ ﻤﺎﺭﻩ٣٧ ﺻﻔﺤﺎﺕ، ٣٨ - ٣٥ ، ١٣٨٥ No. 37, pp. 35-38, 2006 Short Paper ﻛﻮﺗﺎﻩ ﻣﻘﺎﻟﻪ ﺑﺎ ﺯ ﻳ ﺍ ﺎﻓﺖ ﻳ ﻏﻨ ﺰﻭﺗﻮﭖ ﻲ ﭘﺎ ﻭ ﺷﺪﻩ ﻳ ﺪﺍﺭ٩٨ ‐ Mo ﺍﺯ ﻛ ﻠﮑﺘﻮﺭ ﮔ ﺮﺍﻓ ﻴ ﺘﯽ ﺩﺳﺘﮕﺎﻩ EMIS ﺗﺼﻔ ﻭ ﻴ ﺷ ﻪ ﻴ ﻤ ﻴ ﺎ ﻳﻲ ﺁﻥ ﮔﺮﻭﺳﻲ ﺟﻮﺍﺩ* ، ﺯﻳﻨﻠﻲ ﺑﺎﺑﻚ ﺳﺮﺁﺑﺎﺩﺍﻧﻲ، ﭘﺮﻭﻳﻦ ﻧﻮﺭﻛﺠﻮﺭﻱ، ﺣﺴﻦ ﺗﺤﻘﻴﻘﺎ ﻣﺮﻛﺰ ﺕ ﻫﺴﺘﻪ ﭘﺰﺷﻜﻲ ﻭ ﻛﺸﺎﻭﺭﺯﻱ ﺍﻱ ﺍﺗﻤﻲ ﺍﻧﺮﮊﻱ ﺳﺎﺯﻣﺎﻥ، ﭘﺴﺘﻲ ﺻﻨﺪﻭﻕ ﺍﻳﺮﺍﻥ،: ٤٩٨ ‐ ٣١٤٨٥ ﻛﺮﺝ، ‐ ﺍﻳﺮﺍﻥ ﭼ ﻜ ﻴﺪﻩ: ﺑﺎﺯ ﻳ ﺗﺼﻔ ﻭ ﺎﻓﺖ ﻴ ﺍ ﻪ ﻳ ﺰﻭﺗﻮﭖ ﻏﻨﯽ ﻣﻮﻟ ﺷﺪﻩ ﻴ ﺒﺪﻥ٩٨ ﺑ ﮐﻪ ﻮﺳﻴﻠﺔ ﺍﻟﮑﺘﺮﻭﻣﻐﻨﺎﻃ ﺟﺪﺍﮐﻨﻨﺪﻩ ﺩﺳﺘﮕﺎﻩ ﻴ ﺍ ﺴﯽ ﻳ ﺰﻭﺗﻮﭘﻬﺎ ﺩﺭ ﺑﺮ ﮐﺮﺝ ﻣﺮﮐﺰ ﭘﺎﮐﺖ ﺭﻭﯼ ﮔﺮﺍﻓ ﻴ ﺟﻤﻊ ﺘﯽ ﺷﺪﻩ ﺁﻭﺭﯼ ﺑﺎﺭ ﻧﺨﺴﺘﻴﻦ، ﺍﺳﺖ ﻛﻪ ﺑﻪ ﺷ ﺭﻭﺵ ﻴ ﻤ ﻴ ﺎ ﻳﻲ ﺍ ﺩﺭ ﻳ ﺍﻧﺠﺎﻡ ﺮﺍﻥ ﺍﺳﺖ ﮔﺮﻓﺘﻪ. ﺩﺭ ﺍ ﻳ ﭘﮋﻭﻫﺸﯽ ﮐﺎﺭ ﻦ، ﺑ ﺍﺑﺘﺪﺍ ﺎ ﺧﺮ ﺍﺷ ﻴ ﭘﺎﮐﺖ ﺳﻄﻮﺡ ﺪﻥ ﮔﺮﺍﻓ ﻴ ﺍ ﮐﻪ ﺘﯽ ﻳ ﻣﻮﻟ ﺰﻭﺗﻮﭖ ﻴ ﺒﺪﻥ٩٨ ﺍﻧﺒﺎﺷﺘ ﺁﻥ ﺭﻭﯼ ﺑﺮ ﻪ ﺷﺪﻩ ﺑﻮﺩ ﮔﺮﺍﻓ ﭘﻮﺩﺭ ﺍﺯ ﻣﺨﻠﻮﻃﯽ، ﻴ ﻭ ﺖ ﻣﻮﻟ ﻴ ﺁﻣﺪ ﺩﺳﺖ ﺑﻪ ﺒﺪﻥ ؛ ﮐﻮﺭﻩ ﺍﺯ ﺍﺳﺘﻔﺎﺩﻩ ﺑﺎ ﺳﭙﺲ ﺍﻟﮑﺘﺮ ﻳﮑﯽ ﺩﺍﺩﻥ ﻋﺒﻮﺭ ﺑﺎ ﺍﮐﺴﻴ ﮔﺎﺯ ﺩﺭ ﮋﻥ ﺩﻣﺎﯼ º C ٨٥٠ ، ﺗﺮ ﻱ ﺍﮐﺴ ﻴ ﻣﻮﻟ ﺪ ﻴ ﺒﺪﻥ) ٣ MoO ٩٨ ( ﺗﺸﮑ ﻴ ﮔﺮﺍﻓ ﻭ ﻞ ﻴ ﺩ ﺻﻮﺭﺕ ﺑﻪ ﺖ ﻱ ﺍﮐﺴ ﻴ ﺧﺎﺭﺝ ﺪﮐﺮﺑﻦ ﺷﺪ. ﺩﺭ ﺑﻌﺪ ﻣﺮﺣﻠﻪ، ﺁﻣﻮﻧ ﻣﺤﻠﻮﻝ ﺍﺯ ﻴ ﻭ ﮔﺮﻡ ﺎﮎ ﻏﻠ ﻴ ﺍﮐﺴ ﺍﻧﺤﻼﻝ ﺑﺮﺍﯼ ﻆ ﻴ ﻣﻮﻟ ﺪ ﻴ ﺷﺪ ﺍﺳﺘﻔﺎﺩﻩ ﺒﺪﻥ ﻭ ﺩﺭ ﺷﺮﺍ ﻳ ﻗﻠ ﻂ ﻴ ﺎ ﻳﻲ ﺻﻮﺭﺕ ﺑﻪ ﺁﻫﻦ ﻋﻤﺪﻩ ﻧﺎﺧﺎﻟﺼﯽ، ﻫ ﻴ ﺪﺭﻭﮐﺴ ﻴ ﺪﺁﻫﻦ(III) ﺭﺳ ﻮ ﺏ ﻛﺮﺩ. ﺑﺎ ﺁﻥ ﺍﺯ ﭘﺲ ﺍﺳﻴ ﺪ ﺳﻮﻟﻔﻮﺭ ﻳ ﻣﺤ ﮏ ﻴ ﺍﺳ ﺭﺍ ﻂ ﻴ ﺪﯼ ﻛﺮﺩﻩ ﮐ ﺍﻓﺰﻭﺩﻥ ﺑﺎ ﻭ ﻴ ﺩﻫﻨﺪ ﻼﺕ ﺓ ﺑﻨﺰﻭﺋ ﺁﻟﻔﺎ ﻴ ﹸ ﺍ ﻦ ﮐﺴ ﻴ ﻢ، ﮐﻤﭙﻠﮑﺲ ﺁﻟ ﯽ- ﻣﻮﻟ ﻓﻠﺰﯼ ﻴ ﺁﻣﺪ ﺩﺳﺖ ﺑﻪ ﺭﺳﻮﺏ ﺻﻮﺭﺕ ﺑﻪ ﺒﺪﻥ. ﺍﻟﮑﺘﺮ ﮐﻮﺭﻩ ﺩﺭﻭﻥ ﺷﺪﻥ، ﺧﺸﮏ ﻭ ﺻﺎﻑ ﺍﺯ ﭘﺲ ﺣﺎﺻﻞ، ﺭﺳﻮﺏ ﻳ ﺩﻣﺎﯼ ﺩﺭ ﮑﯽ٥٠٠ ﺩﺭﺟﻪ ﺳﺎﻧﺘ ﻲ ﺍﮐﺴ ﺑﻪ ﻭ ﺳﻮﺯﺍﻧﺪﻩ ﮔﺮﺍﺩ ﻴ ﻣﻮﻟ ﺪ ﻴ ﺗﺒﺪ ﺒﺪﻥ ﻳ ﻞ ﺷﺪ. ﻣﻮﻟﮑﻮﻟﯽ ﺳﺎﺧﺘﺎﺭ ﺍﻳﻦ ﺍﮐﺴ ﻴ ﻭﺳ ﺑﻪ ﺪ ﻴ ﻠ ﺔ ﭘﺮﺍﺵ ﺍﺳﭙﮑﺘﺮﻭﺳﮑﻮﭘﯽ ﭘﺮﺗﻮﻫﺎﻱ ﺍ ﻳ ﮑﺲ) XRD ( ﺗ ﺄ ﻳﻴ ﺩﺭ ﻭ ﺪ ﻧﻬﺎ ﻳ ﺖ ﺍﺳﺘﻔﺎﺩﻩ ﺑﺎ، ﻃﻴﻒ ﺍﺯ ﺍﺗﻤﻲ ﻧﺸﺮ ﺳﻨﺞ) ICP ( ﺷ ﺧﻠﻮﺹ ﻴ ﻤ ﻴ ﺎ ﻳﻲ ﻣﻌﺎﺩﻝ ﻣﺤﺼﻮﻝ٤٤ / ٩٧ % ﺗﻌﻴﻴﻦ ﺷ ﺪ. ﻭﺍﮊﻩ ﻛﻠﻴﺪﻱ ﻫﺎﻱ: ﻣﻮﻟﻴﺒﺪﻥ ﺷﻴﻤﻴﺎﻳﻲ، ﺗﺼﻔﻴﻪ ﺑﺎﺯﻳﺎﻓﺖ،۹۸ ﹸﻛﺴﻴﻢ ﺍ ﺁﻟﻔﺎﺑﻨﺰﻭﺋﻴﻦ ﮔﺮﺍﻓﻴﺘﻲ، ﭘﺎﻛﺖ، Recovery of Mo-98 Enriched Stable Isotope from Graphite Collector of EMIS and its Chemical Purification J. Garousi*, H. Noorkojouri, P. Sarabadani, B. Zeinali Nuclear Research Centre for Agriculture and Medicine, AEOI, P.O. Box: 31485-498, Karaj - Iran Abstract: Recovery and chemical purification of Mo-98 from graphite collector which was separated by EMIS were made for the first time in Iran. In this research work, metallic Mo-98 isotope deposited on the internal surface of graphite was separated from pocket by scraping. Then, carbon was removed from the mixture of molybdenum and graphite by burning at 850 º C in oxygen atmosphere in the form of CO 2 and molybdenum was converted to oxide form (MoO 3 ). Molybdenum tri-oxide was dissolved in hot and concentrated ammonia solution. In alkaline condition, the major impurity of Fe as hydroxide form was precipitated. In the next step, after acidifying the solution by sulfuric acid, α-benzoin oxime was added, and molybdenum organometalic complex was formed. The complex was filtrated, dried and ignited at 500 º C in electrical furnace. Finally, 98 MoO 3 was obtained. The crystalline structure of MoO 3 was confirmed by X-ray Diffraction (XRD) and its chemical purity of 97.44% was determined using the ICP- emission spectrometer. Keywords: Recovery, Chemical Purification, Mo-98, Graphite Collector, α-Benzoin Oxime ﻣﻘﺎﻟ ﺩﺭﻳﺎﻓﺖ ﺗﺎﺭﻳﺦ ﻪ: ٢٧ / ٤ / ٨٤ ﻣﻘﺎﻟﻪ ﭘﺬﻳﺮﺵ ﺗﺎﺭﻳﺦ: ٣ / ٢ / ٨٥ JGAROUSI@yahoo.com *email: ۳۵