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Synthesis and characterization of new azo-dye reagent and using to spectrophotometric determination of samarium(III) in some industrial and blood samples

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Abstract

A new azo-dye reagent was prepared by the reaction between sulfacetamide and rutin compounds. The new synthesized reagent of (E)-N-((4-((5-(5,7-dihydroxy-3-3-[3-α-l-rhamnopyranosyl-(1 → 6)-β-d-glucopyrano-syloxy]-4-oxo-4H-chromen-2-yl)-2,3-dihydroxyphenyl)diazenyl)phenyl)sulfonyl)acetamide [NDRGA] was characterized by FT-IR, 1HNMR, mass spectra and elemental analysis measurements and then used for the spectrophotometric determination of Sm(III). The proposed method was based on the formation of a lemon-colored complex between Sm(III) and NDGRA reagent in an alkaline medium using borate buffer at pH = 8 with absorption maximum at 475 nm. The method was enhanced by the use of cationic surfactant of cetylpyridinium bromide (CPB). Different factors affecting the formation and stability of the complex such as reagent concentration, time, temperature, solvents and order of addition were also studied. The composition of the complex was found to be 1:1 (metal: ligand) by using Job’s and molar ratio methods. The stability constant of the complex was calculated to be 1.1805 × 106. The method showed a good linearity in the concentration range of 2.0–90 µg ml−1 of Sm(III) with molar absorptivity and Sandell’s sensitivity 1.3014 × 104 L mol−1 cm−1 and 1.155 × 10−2 µg cm−2, respectively. The limit of quantification (LOQ) and detection (LOD) were calculated. The interference effect of some foreign ions was also studied. The validity of the calibration curve was found useful for the determination of micro-amounts of Sm(III) in some industrial and blood samples.

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Correspondence to Badr Abd El-wahaab.

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Abd El-wahaab, B., Elgendy, K. & El-didamony, A. Synthesis and characterization of new azo-dye reagent and using to spectrophotometric determination of samarium(III) in some industrial and blood samples. Chem. Pap. 74, 1439–1448 (2020). https://doi.org/10.1007/s11696-019-01000-8

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  • DOI: https://doi.org/10.1007/s11696-019-01000-8

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