Abstract
This study reports the tolerance limits of a few inorganic quenchers on uranium fluorescence in presence of five different fluorescence enhancing reagents (FER) used in fluorimetric technique with LED (405 nm) as the excitation source. Fluorescence enhancing capacities of five different phosphate based reagents are compared. A 2 °C rise in temperature quenches the U fluorescence by 5% in all the FERs. Quenching effects of 11 ions in terms of their characteristic half concentration (C1/2) values were established. Based on the C1/2 values quenchers are classified as weak, moderate and strong.
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Acknowledgements
Authors wish to thank Dr. D. K. Sinha, Director, Dr. T. S. Sunilkumar, Additional Director and Dr. Smeer Durani, Head, Chemistry Group of Atomic Minerals Directorate for Exploration and Research (AMD) for their encouragement and support in carrying out research work and for permission to publish the paper. We are also thankful to Dr. Manjeet Kumar, former Head, Chemistry Group, AMD for the encouragement during the conceptualization of this work. Authors also wish to thank the engineers of M/s. Quantalase, Indore for their support and fruitful technical discussions during the course of this work.
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MK was instrumental in conceptualization of the study and carried out all experiments in collaboration with JG and interpreted the results. AAP contributed in overall presentation of the manuscript.
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Krishnakumar, M., George, J. & Patwardhan, A.A. Estimation of tolerance limits of inorganic quenchers on LED fluorimetric determination of uranium. J Radioanal Nucl Chem 332, 1795–1804 (2023). https://doi.org/10.1007/s10967-023-08897-2
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DOI: https://doi.org/10.1007/s10967-023-08897-2