Authors

  • Jasur Tursunqulov

DOI:

https://doi.org/10.71337/inlibrary.uz.science-research.139330

Keywords:

extraction-spectrophotometric method distribution coefficient standard potential 1-(2-hydroxy-1-naphthazo)-2-naphthol-4-sulfonic acid (HNNS) zinc.

Abstract

A method for the determination of the zinc (II) ion using a solution of 1-(2-hydroxy-1-naphthazo)-2-naphthol-4-sulfonic acid (HNNS) by extraction-spectrophotometric and cyclic voltammetric techniques is proposed. The optimal conditions were studied: distribution coefficient 0.98, choice of organic solvent, the ratio of organic to aqueous phases of 1:8, standard potential -0.51 V, and the detection limit of 0.387 µg/L. The reagent shows light absorption at 500 nm [1], contrast equal to 100 nm, and potential contrast of 0.98 V, which demonstrates the high sensitivity of the developed method. The developed method was compared with other analytical techniques and proved to be not inferior to them.

References

Kumar S., Patel R. (2022). Spectrophotometric detection of Zn(II) with azo ligands. J. Anal. Chem., 77(4), 621–630.

Lv X., Hu H., Yao L. et al. (2023). Fabrication of ion-imprinted rice-husk polymer for Zn²⁺ adsorption. Spectrochim. Acta A Molecular Spectrosc., 298, 122723.

Demir S., Andac M. (2021). Spectrophotometric determination of transition-metal ions using salophen derivatives. J. Taibah Univ. Sci., 15(3), 765–773.

Rashid U., Ibrahim M. (2024). Electrochemical sensing of Zn(II) in water using modified electrodes. Appl. Sci., 14(2), 4476.

Babayev K. et al. (2020). New spectrophotometric reagents for Zn²⁺ determination. Iran. J. Chem. Chem. Eng., 39(3), 117–126.

Tursunqulov J., Qutlimurotova N. (2024). Electrochemical study of metal–HNSA complexes. Int. J. Environ. Anal. Chem., 104, 2333988.

Kawan F. & Abdullah A. (2024). Fluorescent detection of Zn²⁺ ions using smartphone-integrated sensors. J. Food Compos. Anal., 135, 106577.

Ayvazova A., Mughalova G. (2019). Spectrophotometric methods for trace metals with azo reagents. New Mater. Compd. Appl., 3(1), 23–28.

Turabov N. et al. (2023). Novel spectrophotometric determination of metal ions in aqueous systems. Universum: Chemistry and Biology, 6(108).

Elchishcheva Y. et al. (2023). Development of photometric methods for divalent-metal ions. Perm Univ. Bull. Chem., 13(2), 83–91.

Tursunqulоv J.B., Qutlimurоtоvа N.H., Rаhimоv S.B., Kutlimurоtоvа R.H. Ехtrаctiоn-spеctrоphоtоmеtric dеtеrminаtiоn оf scаndium (III) iоn with 1-(2-hydrохy-1-nаphtоyаzо)-2- nаphthоl-4-sulfоcid sоlutiоn // Univеrsum: химия и биология: электрон. научн. журн. – 2024. – Т.2. – № 116. – С. 36–44. [Электронный ресурс]. – Режим доступа: https://7univеrsum.cоm/ru/nаturе/аrchivе/itеm/16673. (дата обращения: 10.11.2024).

Xinyan Lv, Huiyi Hu, Lifeng Yao, Lili Deng, Xiuhong Liu, Lide Yu, Haifeng He.Fabrication of surface ion imprinting rice husk-based polymer for selective detection and efficient adsorption of Cu2+ in lake water. //Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. – 2023. – Vol. 298. – 122723. https://doi.org/10.1016/j.saa.2023.122723