Document Type : Research Paper

Author

• S.R. Yousefi

Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, AEOI, P.O.Box: 11365-8486, Tehran - Iran

Abstract

In this study, an online homogenous sedimentation method was utilized for the in situ production of micro particles to be used as an adsorbent for solid-phase extraction of molybdenum. The process involved the dissolution of yellow cake and the conversion of molybdenum (VI) into a hydrophobic complex, followed by the addition of n-dodecyltrimethylammonium bromide as a precursor to the sample solution. A precipitant reagent, sodium hexafluoride, was then introduced into the solution through a T connection in a flow system. Micro particles were produced as a result of the interaction between the precursor and the precipitant reagent, which then adsorbed the molybdenum complex. After filtration, a desorption reagent was passed over the filter to release the adsorbed molybdenum, which was subsequently measured using ICP-OES. The method yielded a linear range of 0.2-200 µg/L, with a limit of detection of 0.05 µg/g. The repeatability of the method (RSD) was found to be 8.1% and 4.3% for concentrations of 10 and 100 µg/g, respectively. Overall, this method demonstrates potential for the precise and accurate determination of molybdenum in yellow cake samples.

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Keywords

• Micro particles
• Homogenous sedimentation
• Yellow cake
• Molybdenum
• ICP-OES