SPECTROPHOTOMETRIC DETERMINATION OF ZINC IONS USING 4-(2-PYRIDYLAZO)-RESORCINOL REAGENT

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SRT 3(3)
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Published: 13.09.2025
DOI: https://doi.org/10.70769/3030-3214.SRT.3.3.2025.20
Keywords:
zinc ions, spectrophotometry, 4-(2-pyridylazo)-resorcinol (PAR), complex compound, optical density, buffer solution, determination sensitivity

Main Article Content

Turabov, N.T.
Candidate of Chemical Sciences, Professor, Mirzo Ulugbek National University of Uzbekistan, Tashkent, Uzbekistan
Todjiev, J.N.
Candidate of Chemical Sciences, Associate Professor, Mirzo Ulugbek National University of Uzbekistan, Tashkent, Uzbekistan
Xayrullaeva, Sh.L.
Mirzo Ulugbek National University of Uzbekistan, Tashkent, Uzbekistan

Abstract

This article investigates the optimal conditions for the spectrophotometric determination of zinc ions using the reagent 4-(2-pyridylazo)-resorcinol (PAR). The optical density of the zinc–PAR complex was studied under various conditions, including wavelength (λ), solution pH, buffer composition, and the order of reagent addition. The results revealed that maximum absorbance is observed at λ=550 nm in an acetate buffer solution with pH=5.08, when the components are added in the following sequence: zinc – buffer – reagent – distilled water. These optimized conditions provide high sensitivity and accuracy in zinc determination. Furthermore, the proposed method is environmentally safe and can be recommended as a rapid and effective analytical tool in modern analytical chemistry.

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Issue

Vol. 3 No. 3 (2025)

Section

Chemical Technology and Construction
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How to Cite

Turabov, N. T., Todjiev, J. N., & Xayrullaeva, S. L. (2025). SPECTROPHOTOMETRIC DETERMINATION OF ZINC IONS USING 4-(2-PYRIDYLAZO)-RESORCINOL REAGENT. Digital Technologies in Industry, 3(3). https://doi.org/10.70769/3030-3214.SRT.3.3.2025.20

References

1. Islam, M. T., & Ahmed, M. J. (2013). A simple spectrophotometric method for the trace determination of zinc in some real, environmental, biological, pharmaceutical, milk and soil samples using 5,7-dibromo-8-hydroxyquinoline. Pak. J. Anal. Environ. Chem., 14(1), 1–15.

2. Карибьянц, М. А., и др. (2014). Исследование равновесий в растворах системы м-крезолфталексон S-цинк в присутствии метоклопрамида. Инновации в науке, (38), 11–17.

3. Todjiyev, J. N., Turabov, N., Xusanov, B. M., Turaeva, G. S., Lakaev, Sh. S., Razzoqova, S. R., Sagdillayeva, Z. A., Yuldasheva, U. A., Muhammedova, B. I., Sapaev, I. B., & Yunusov, Kh. E. (2024). Determination of Ni(II) ions in natural objects and industrial alloys via a spectrophotometric method with 4,5-dihydroxy-3,6-dinitrosonaphthalene-2,7-disulfoxic acid. Chemical Review and Letters, 10, 895–911.

4. Todjiyev, J. N., Turabov, N., Turaeva, G. S., Xusanov, B. M., Yunusov, Kh. E., Tuliyev, B. A., Gazieva, A. S., Pulatova, G. U., & Smanova, Z. A. (2024). Spectrophotometric determination of microconcentrations of zinc(II) and copper(II) in water and industrial alloys using a new chromogenic reagent [4-amino-5-hydroxy-6-[(5-methyl-2-pyridyl)azo]-3-sulfo-1-naphthyl]sulfonyloxysodium. Chemical Review and Letters, 3, 388–403. https://doi.org/10.22034/CRL.2024.457689.1338 DOI: https://doi.org/10.69617/nuuz.v3i3.1.1.5446

5. Иванова, Ю. Б., Семейкин, А. С., Мамардашвили, Н. Ж., & Койфман, О. И. (2015). Спектрофотометрическое исследование кислотных и комплексообразующих свойств производных октаметилпорфирина. Известия высших учебных заведений. Химия и химическая технология, 58(9), 15–21.

6. Антонова, Т. В., Черненко, С. А., & Шацаускас, А. Л. (2017). Производные 1,7-нафтиридина как аналитические реагенты для спектрометрического определения переходных металлов. Молодёжь третьего тысячелетия, 1619–1623.

7. Гамов, Г. А., Завалишин, М. Н., Хохлова, А. Ю., Гашникова, А. В., & Шарнин, В. А. (2018). Устойчивость комплексов Cu(II), Zn(II) с пиридинкарбогидразонами пиридоксаль-5-фосфата в водном растворе. Журнал общей химии, 88(7), 1144–1148. DOI: https://doi.org/10.1134/S0044460X18070144

8. Иванова, Ю. Б., Разгоняев, О. В., Семейкин, А. С., & Мамардашвили, Н. Ж. (2015). Спектрофотометрическое исследование основных и координационных свойств 5,10,15,20-тетракис-(тиен-2-ил)-2,3,7,8,12,13,17,18-октаметилпорфирина. Журнал общей химии, 85(4), 635–640.

9. Safaa, S. N., Maha, A. Al-H. H., Mundher, A. Al-Sh., & Tahseen, S. F. (2020). Spectrophotometric determination of zinc in pharmaceutical medication samples using 8-hydroxyquinoline reagent. International Journal of Chemistry, 12(1), 28–36. https://doi.org/10.5539/ijc.v12n1p29 DOI: https://doi.org/10.5539/ijc.v12n1p29

10. Alabidi, H. M., Farhan, A. M., & Al-Rufaie, M. M. (2021). Spectrophotometric determination of Zn(II) in pharmaceutical formulation using a new azo reagent as derivative of 2-naphthol. Current Applied Science and Technology, 1, 176–187.

11. Нуранеева, Е. Н., Гусева, Г. Б., & Антина, Е. В. (2017). Влияние особенностей галогенирования на устойчивость координационных соединений цинка(II) с моноиод- и дибромдипиррометенами. Журнал общей химии, 87(7), 1157–1163.

12. Mammadov, P. R. (2020). Simple spectrophotometric method for the determination of zinc (II) using 4,4'-bis-(2,3,4-trihidroksifenilazo)-difenil. Transactions of Pedagogical University. Təbiət elmləri, 68(1), 48–57.