UV-Visible Spectrophotometry with Arsenazo III for the Determination of Samarium

UV-visible spectrophotometry with Arsenazo III is used to determine the samarium concentration. The results confirm that the concentration of Sm 3+ in the aqueous solution from 2.7 × 10 –6 to 10.8 × 10 –6 mol/L obeys the Lambert–Beer law. The quantitative relationship between the absorbance and conc...

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Bibliographic Details
Published in:Journal of applied spectroscopy 2019-07, Vol.86 (3), p.542-548
Main Authors: Guo, Xing-Min, Yan, Qi-Cao, Meng, Xiao-Ting, Ma, Rui-Xin
Format: Article
Language:English
Subjects:
Absorbance
Analytical Chemistry
Aqueous solutions
Atomic/Molecular Structure and Spectra
Beer law
Calcium ions
Physics
Physics and Astronomy
Samarium
Spectrophotometry
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Summary:UV-visible spectrophotometry with Arsenazo III is used to determine the samarium concentration. The results confirm that the concentration of Sm 3+ in the aqueous solution from 2.7 × 10 –6 to 10.8 × 10 –6 mol/L obeys the Lambert–Beer law. The quantitative relationship between the absorbance and concentrations of Ca 2+ and F– in the solution with 2.7 × 10 –6 mol/L Sm 3+ has been obtained. The absorbance of the solution with 10.8 × 10–6 mol/L Sm 3+ is found to be 0.58, which is not affected by the concentrations of Ca 2+ and F–. So, if the concentrations of Ca 2+ and F– were known, the quantitative relationship between absorbance and Sm 3+ concentration can be obtained, which is convenient for determining the Sm 3+ concentration in aqueous solution with Ca 2+ and F– by UV-visible spectrophotometry.
ISSN:0021-9037
1573-8647
DOI:10.1007/s10812-019-00856-8