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  • Ammonium molybdophosphate impregnated alumina microspheres as a new generation sorbent for chromatographic 137Cs/(137m)Ba generator.

Ammonium molybdophosphate impregnated alumina microspheres as a new generation sorbent for chromatographic 137Cs/(137m)Ba generator.

Journal of chromatography. A (2011-12-27)
Rubel Chakravarty, Ramu Ram, K T Pillai, Yugandhara Pamale, R V Kamat, Ashutosh Dash
ABSTRACT

Barium-137m availed from a (137)Cs/(137m)Ba generator is an attractive industrial radiotracer for liquid flow rate measurement owing to its short half-life (T(1/2)=2.5 min) and emission of highly energetic gamma radiation (E(γ)=661.7 keV). Ammonium molybdophosphate (AMP) impregnated alumina microspheres (AMP-Al(2)O(3)), an engineered form of sorbent material was synthesized by Gel Entrapment Technique (GET). The utility of the material in the preparation of (137)Cs/(137m)Ba generator was evaluated. Various experimental parameters were optimized for efficient retention of (137)Cs and selective elution of (137m)Ba. A chromatographic 0.74 GBq (20 mCi) (137)Cs/(137m)Ba generator was developed using this material and its performance was evaluated for 6 months. Barium-137m could be eluted from the generator using 0.1 M NH(4)NO(3)+0.5 M HNO(3) solution with >80% yield and with acceptable radionuclidic purity suitable for industrial radiotracer investigations.

MATERIALS
Product Number
Brand
Product Description

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Phosphomolybdic acid solution, 20 wt. % in ethanol
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