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Preparation of In-House Calibration Standard Solutions for Mn, Co and Their Assay Using Nuclear Analytical Techniques

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Abstract

Calibration is the primary step in most of the instrumental analytical techniques. Separate calibration standard solutions of Mn, Co were prepared by dissolution of MnSO4·H2O and Co metal in HNO3 media. Neutron activation analysis and energy-dispersive X-ray fluorescence spectrometry were used for assay, homogeneity and stability assessments of these solutions. During the whole preparation, assessment processes, all care was taken to maintain an unbroken chain of comparisons, to establish the traceability of the present solutions to NIST reference standard solutions. The role of appropriate concentration range for multi-point calibration procedures was explicit by closely monitoring the intercept and slope of the least square curve. Accuracies of the measurements for different concentration ranges were compared in terms of the % error in the final calculated concentrations for quality control standards. Atomic absorption spectrometry and inductively coupled plasma optical emission spectrometry were used to assess the impurity profiles in the in-house calibration standard solutions. The values of Co and Mn were assigned according to ISO Guide 80:2014 guidelines.

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Acknowledgements

The authors acknowledge the guidance and support by Dr. C.N. Patra, Head, Analytical Chemistry Division (ACD), BARC, throughout the entire work. All the colleagues of Nuclear Analytical Methods Section, ACD, during the entire laboratory experiments and the service rendered by the divisional colleagues for ICP-OES and CS-AAS are also duly acknowledged. The authors also thank the operation crew of Dhruva and Critical Facility reactors for help during neutron irradiations.

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Correspondence to P. S. Remya Devi.

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Remya Devi, P.S., Ajith, N., Chavan, T.A. et al. Preparation of In-House Calibration Standard Solutions for Mn, Co and Their Assay Using Nuclear Analytical Techniques. MAPAN 37, 631–640 (2022). https://doi.org/10.1007/s12647-022-00571-4

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