zldmЗаводская лаборатория. Диагностика материаловIndustrial laboratory. Diagnostics of materials1028-68612588-0187ООО «Издательство «ТЕСТ-ЗЛ»10.26896/1028-6861-2022-88-8-17-26zldm-1719Research ArticleАНАЛИЗ ВЕЩЕСТВАSUBSTANCES ANALYSISSpectrophotometric determination of bismuth potassium ammonium citrate in cleaning wastes of industrial equipment with 4-(2’-pyridylazo)-resorcinolSpectrophotometric determination of bismuth potassium ammonium citrate in cleaning wastes of industrial equipment with 4-(2’-pyridylazo)-resorcinolNikolaychukP. A.NikolaychukP. A.

Pavel A. Nikolaychuk

11, prosp. Konstitutsii, Kurgan, 640008

Pavel A. Nikolaychuk

11, prosp. Konstitutsii, Kurgan, 640008

npa@csu.ruChemical Analysis Laboratory, Quality Assurance Department, LLC «Velpharm»РоссияChemical Analysis Laboratory, Quality Assurance Department, LLC «Velpharm»Russian Federation2022210820228881726Copyright © Nikolaychuk P.A., 20222022Nikolaychuk P.A.Nikolaychuk P.A.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.zldm.ru/jour/article/view/1719

A simple spectrophotometric method for the determination of bismuth potassium ammonium citrate in the cleaning wastes of industrial equipment using 4-(2’-pyridylazo)-resorcinol is proposed. The method is based on displacement of bismuth from its potassium ammonium citrate by 4-(2’-pyridylazo)-resorcinol, formation of the colored complex, and the colorimetric determination of the resulting product. The calibration curve is linear within the range from 4 to 20 mg/L of bismuth potassium ammonium citrate, the molar attenuation coefficient is 10,100 m2/mol, the detection limit is 2.7 mg/L, the quantification limit is 8.2 mg/L. The method is selective with respect to the common excipients, exhibits a good accuracy (the relative uncertainty does not exceed 10%) and precision (the relative standard deviation does not exceed 5%), does not require lengthy sample preparation and sophisticated laboratory equipment and is suitable for the routine analysis of the cleaning wastes of industrial equipment.

A simple spectrophotometric method for the determination of bismuth potassium ammonium citrate in the cleaning wastes of industrial equipment using 4-(2’-pyridylazo)-resorcinol is proposed. The method is based on displacement of bismuth from its potassium ammonium citrate by 4-(2’-pyridylazo)-resorcinol, formation of the colored complex, and the colorimetric determination of the resulting product. The calibration curve is linear within the range from 4 to 20 mg/L of bismuth potassium ammonium citrate, the molar attenuation coefficient is 10,100 m2/mol, the detection limit is 2.7 mg/L, the quantification limit is 8.2 mg/L. The method is selective with respect to the common excipients, exhibits a good accuracy (the relative uncertainty does not exceed 10%) and precision (the relative standard deviation does not exceed 5%), does not require lengthy sample preparation and sophisticated laboratory equipment and is suitable for the routine analysis of the cleaning wastes of industrial equipment.

bismuth potassium ammonium citratespectrophotometric determination4-(2’-pyridylazo)-resorcinolindustrial equipment cleaning wastesbismuth potassium ammonium citratespectrophotometric determination4-(2’-pyridylazo)-resorcinolindustrial equipment cleaning wastesReferencesNaydenko E. S., Podlipskaya T. Yu., Yukhin Yu. M., Ogienko A. G. Freeze-drying process for the design of porous formulations based on bismuth-potassium-ammonium citrate / J. Dispersion Sci. Technol. 2021. Vol. 42. N 2. P. 173–179. DOI: 10.1080/01932691.2020.1711770Naydenko E. S., Podlipskaya T. Yu., Yukhin Yu. M., Ogienko A. G. Freeze-drying process for the design of porous formulations based on bismuth-potassium-ammonium citrate / J. Dispersion Sci. Technol. 2021. Vol. 42. N 2. P. 173–179. DOI: 10.1080/01932691.2020.1711770Koledova E. S., Artamonova A. A., Yukhin Yu. M. Obtaining Bismuth – Potassium – Ammonium Citrate by Interaction of Bismuth Oxide with Potassium and Ammonium Citrates Solutions / Zh. Sib. Fed. Univ. Khim. 2021. Vol. 14. N 2. P. 242–251 [in Russian]. DOI: 10.17516/1998-2836-0233Koledova E. S., Artamonova A. A., Yukhin Yu. M. Obtaining Bismuth – Potassium – Ammonium Citrate by Interaction of Bismuth Oxide with Potassium and Ammonium Citrates Solutions / Zh. Sib. Fed. Univ. Khim. 2021. Vol. 14. N 2. P. 242–251 [in Russian]. DOI: 10.17516/1998-2836-0233Liu X., Xiao M., Xu L., et al. Characteristics, applications and determination of bismuth / J. Nanosci. Nanotechnol. 2016. Vol. 16. N 7. P. 6679–6689. DOI: 10.1166/jnn.2016.11371Liu X., Xiao M., Xu L., et al. Characteristics, applications and determination of bismuth / J. Nanosci. Nanotechnol. 2016. Vol. 16. N 7. P. 6679–6689. DOI: 10.1166/jnn.2016.11371Das A. K., Chakraborty R., Cervera M. L., de la Guardea M. Analytical techniques for the determination of bismuth in solid environmental samples / TrAC Trends Anal. Chem. 2006. Vol. 25. N 6. P. 599–608. DOI: 10.1016/j.trac.2006.01.006Das A. K., Chakraborty R., Cervera M. L., de la Guardea M. Analytical techniques for the determination of bismuth in solid environmental samples / TrAC Trends Anal. Chem. 2006. Vol. 25. N 6. P. 599–608. DOI: 10.1016/j.trac.2006.01.006West P. W., Coll H. Spectrophotometric determination of bismuth with ethylenediaminetetraacetic acid / Anal. Chem. 1955. Vol. 27. N 8. P. 1221–1224. DOI: 10.1021/ac60104a004West P. W., Coll H. Spectrophotometric determination of bismuth with ethylenediaminetetraacetic acid / Anal. Chem. 1955. Vol. 27. N 8. P. 1221–1224. DOI: 10.1021/ac60104a004Onishi H., Ishiwatari N. Spectrophotometric determination of bismuth with xylenol orange / Bull. Chem. Soc. Japan. 1960. Vol. 33. N 11. P. 1581–1584. DOI: 10.1246/bcsj.33.1581Onishi H., Ishiwatari N. Spectrophotometric determination of bismuth with xylenol orange / Bull. Chem. Soc. Japan. 1960. Vol. 33. N 11. P. 1581–1584. DOI: 10.1246/bcsj.33.1581Afkhami A., Madrakian T., Siampour H. Cloud point extraction spectrophotometric determination of trace quantities of bismuth in urine / J. Brazil. Chem. Soc. 2006. Vol. 17. P. 797 – 802. DOI: 10.1590/S0103-50532006000400024Afkhami A., Madrakian T., Siampour H. Cloud point extraction spectrophotometric determination of trace quantities of bismuth in urine / J. Brazil. Chem. Soc. 2006. Vol. 17. P. 797 – 802. DOI: 10.1590/S0103-50532006000400024Tzanavaras P. D., Themelis D. G., Economou A. Sequential injection method for the direct spectrophotometric determination of bismuth in pharmaceutical products / Anal. Chim. Acta. 2004. Vol. 505. N 1. P. 167 – 171. DOI: 10.1016/S0003-2670(03)00017-5Tzanavaras P. D., Themelis D. G., Economou A. Sequential injection method for the direct spectrophotometric determination of bismuth in pharmaceutical products / Anal. Chim. Acta. 2004. Vol. 505. N 1. P. 167 – 171. DOI: 10.1016/S0003-2670(03)00017-5Themelis D. G., Tzanavaras P. D., Papadimitriou J. K. Flow injection manifold for the direct spectrophotometric determination of bismuth in pharmaceutical products using Methylthymol Blue as a chromogenic reagent / Analyst. 2001. Vol. 126. N 2. P. 247 – 250. DOI: 10.1039/B008661OThemelis D. G., Tzanavaras P. D., Papadimitriou J. K. Flow injection manifold for the direct spectrophotometric determination of bismuth in pharmaceutical products using Methylthymol Blue as a chromogenic reagent / Analyst. 2001. Vol. 126. N 2. P. 247 – 250. DOI: 10.1039/B008661OBurns D. T., Tungkananuruk N., Thuwasin S. Spectrophotometric determination of bismuth after extraction of tetrabutylammonium tetraiodobismuthate (III) with microcrystalline benzophenone / Anal. Chim. Acta. 2000. Vol. 419. N 1. P. 41–44. DOI: 10.1016/S0003-2670(00)00996-XBurns D. T., Tungkananuruk N., Thuwasin S. Spectrophotometric determination of bismuth after extraction of tetrabutylammonium tetraiodobismuthate (III) with microcrystalline benzophenone / Anal. Chim. Acta. 2000. Vol. 419. N 1. P. 41–44. DOI: 10.1016/S0003-2670(00)00996-XMadrakian T., Afkhami A., Esmaeili A. Spectrophotometric determination of bismuth in water samples after preconcentration of its thiourea — bromide ternary complex on activated carbon / Talanta. 2003. Vol. 60. N 4. P. 831–838. DOI: 10.1016/S0039-9140(03)00135-8Madrakian T., Afkhami A., Esmaeili A. Spectrophotometric determination of bismuth in water samples after preconcentration of its thiourea — bromide ternary complex on activated carbon / Talanta. 2003. Vol. 60. N 4. P. 831–838. DOI: 10.1016/S0039-9140(03)00135-8Rastegarzadeh S., Pourreza N., Larki A. Dispersive liquid-liquid microextraction for the microvolume spectrophotometric determination of bismuth in pharmaceutical and human serum samples / Anal. Methods. 2014. Vol. 6. N 10. P. 3500–3505. DOI: 10.1039/C4AY00526KRastegarzadeh S., Pourreza N., Larki A. Dispersive liquid-liquid microextraction for the microvolume spectrophotometric determination of bismuth in pharmaceutical and human serum samples / Anal. Methods. 2014. Vol. 6. N 10. P. 3500–3505. DOI: 10.1039/C4AY00526KAmin A. S. Cloud-point extraction and spectrophotometric determination of trace quantities of bismuth in environmental water and biological samples / Spectrosc. Lett. 2011. Vol. 44. N 6. P. 424–431. DOI: 10.1080/00387010.2011.574308Amin A. S. Cloud-point extraction and spectrophotometric determination of trace quantities of bismuth in environmental water and biological samples / Spectrosc. Lett. 2011. Vol. 44. N 6. P. 424–431. DOI: 10.1080/00387010.2011.574308Barache U. B., Shaikh A. B., Deodware S. A., et al. Sensitive and selective liquid-liquid extractive spectrophotometric determination of Bismuth (III) from water, pharmaceuticals and synthetic mixtures / Groundwater for Sustainable Development. 2019. Vol. 9. Article 100221. DOI: 10.1016/j.gsd.2019.100221Barache U. B., Shaikh A. B., Deodware S. A., et al. Sensitive and selective liquid-liquid extractive spectrophotometric determination of Bismuth (III) from water, pharmaceuticals and synthetic mixtures / Groundwater for Sustainable Development. 2019. Vol. 9. Article 100221. DOI: 10.1016/j.gsd.2019.100221Niazi A., Habibi S., Ramezani M. Spectrophotometric determination of bismuth in water samples by dispersive liquid-liquid microextraction after multivariate optimization based on box-behnken / J. Chilean Chem. Soc. 2013. Vol. 58. N 3. P. 1899–1901. DOI: 10.4067/S0717-97072013000300023Niazi A., Habibi S., Ramezani M. Spectrophotometric determination of bismuth in water samples by dispersive liquid-liquid microextraction after multivariate optimization based on box-behnken / J. Chilean Chem. Soc. 2013. Vol. 58. N 3. P. 1899–1901. DOI: 10.4067/S0717-97072013000300023Gumus G., Filik H., Demirata B. Determination of bismuth and zinc in pharmaceuticals by first derivative UV — Visible spectrophotometry / Anal. Chim. Acta. 2005. Vol. 547. N 1. P. 138–143. DOI: 10.1016/j.aca.2005.03.028Gumus G., Filik H., Demirata B. Determination of bismuth and zinc in pharmaceuticals by first derivative UV — Visible spectrophotometry / Anal. Chim. Acta. 2005. Vol. 547. N 1. P. 138–143. DOI: 10.1016/j.aca.2005.03.028Gaikwad S. H., Mahamuni S. V., Anuse M. A. Extractive spectrophotometric determination of bismuth (III) in alloy samples using 1-amino-4,4,6-trimethyl(1H,4H)pyrimidine-2-thiol / Indian J. Chem. Technol. 2005. Vol. 12. N 3. P. 365–368. http://hdl.handle.net/123456789/8644Gaikwad S. H., Mahamuni S. V., Anuse M. A. Extractive spectrophotometric determination of bismuth (III) in alloy samples using 1-amino-4,4,6-trimethyl(1H,4H)pyrimidine-2-thiol / Indian J. Chem. Technol. 2005. Vol. 12. N 3. P. 365–368. http://hdl.handle.net/123456789/8644Bashammakh A. S. Extractive spectrophotometric determination of bismuth (III) in water using some ion pairing reagents / J. Chem. 2011. Vol. 8. N 3. P. 1462–1471. DOI: 10.1155/2011/672076Bashammakh A. S. Extractive spectrophotometric determination of bismuth (III) in water using some ion pairing reagents / J. Chem. 2011. Vol. 8. N 3. P. 1462–1471. DOI: 10.1155/2011/672076Wróbel Kaz., Wróbel Kat., Madaí Colunga Urbina E. Application of Internal Standard for Micro Extraction — Spectrophotometric Determination of Bismuth in Pharmaceutical Formulations / Microchim. Acta. 2000. Vol. 135. N 1. P. 87–90. DOI: 10.1007/s006040070022Wróbel Kaz., Wróbel Kat., Madaí Colunga Urbina E. Application of Internal Standard for Micro Extraction — Spectrophotometric Determination of Bismuth in Pharmaceutical Formulations / Microchim. Acta. 2000. Vol. 135. N 1. P. 87–90. DOI: 10.1007/s006040070022Agrawal K., Mundhara G. L., Patel K. S., Hoffmann P. Flow-Injection Analysis Spectrophotometric Determination of Bismuth in Environmental and Pharmaceutical Samples / Anal. Lett. 2004. Vol. 37. N 10. P. 2163–2174. DOI: 10.1081/AL-200026693Agrawal K., Mundhara G. L., Patel K. S., Hoffmann P. Flow-Injection Analysis Spectrophotometric Determination of Bismuth in Environmental and Pharmaceutical Samples / Anal. Lett. 2004. Vol. 37. N 10. P. 2163–2174. DOI: 10.1081/AL-200026693Barakat S. A. Flow injection extraction-spectrophotometric determination of bismuth with di-(hydrogenated tallow alkyl) dimethylammonium chloride / Turkish J. Chem. 2002. Vol. 26. N 3. P. 345 – 350. https://journals.tubitak.gov.tr/chem/abstract.htm?id=5512Barakat S. A. Flow injection extraction-spectrophotometric determination of bismuth with di-(hydrogenated tallow alkyl) dimethylammonium chloride / Turkish J. Chem. 2002. Vol. 26. N 3. P. 345 – 350. https://journals.tubitak.gov.tr/chem/abstract.htm?id=5512Amin A. S., Zaafarany I. A. Spectrophotometric determination of bismuth after solid-phase extraction using amberlite XAD-2 resin modified with 5-(2’-bromophenylazo)-6-hydroxy pyrimidine-2,4-dione / J. Taibah Univ. Sci. 2015. Vol. 9. No. 4. P. 490–497. DOI: 10.1016/j.jtusci.2015.01.003Amin A. S., Zaafarany I. A. Spectrophotometric determination of bismuth after solid-phase extraction using amberlite XAD-2 resin modified with 5-(2’-bromophenylazo)-6-hydroxy pyrimidine-2,4-dione / J. Taibah Univ. Sci. 2015. Vol. 9. No. 4. P. 490–497. DOI: 10.1016/j.jtusci.2015.01.003Abdel-Fadeel M. A., Al-Saidi H. M., El-Bindary A. A., et al. Cloud point extraction — Microvolume spectrophotometry for extraction and determination of bismuth in waters and roadside soil / J. Mol. Liq. 2018. Vol. 249. P. 963 – 969. DOI: 10.1016/j.molliq.2017.11.138Abdel-Fadeel M. A., Al-Saidi H. M., El-Bindary A. A., et al. Cloud point extraction — Microvolume spectrophotometry for extraction and determination of bismuth in waters and roadside soil / J. Mol. Liq. 2018. Vol. 249. P. 963 – 969. DOI: 10.1016/j.molliq.2017.11.138Liu R., Pan J. Direct spectrophotometric determination of bismuth in pharmaceutical products using a flow-injection system / Indian J. Chem. 2000. Vol. 39A. P. 676 – 678. http://hdl.handle.net/123456789/21160Liu R., Pan J. Direct spectrophotometric determination of bismuth in pharmaceutical products using a flow-injection system / Indian J. Chem. 2000. Vol. 39A. P. 676 – 678. http://hdl.handle.net/123456789/21160Jiaming L., Zhiming R., Tianlong Y. Spectrophotometric determination of trace bismuth based on its inhibition to the catalytic fading reaction of protein-methylene blue by polyacrylamide / Chinese J. Anal. Chem. 2002. Vol. 30. P. 422–424.Jiaming L., Zhiming R., Tianlong Y. Spectrophotometric determination of trace bismuth based on its inhibition to the catalytic fading reaction of protein-methylene blue by polyacrylamide / Chinese J. Anal. Chem. 2002. Vol. 30. P. 422–424.Verma C., Tapadia K., Bala Soni A., Sharma A., et al. Determination of bismuth (III) in environmental and pharmaceutical samples using an organic reagent / Anal. Methods. 2017. Vol. 9. N 24. P. 3682–3688. DOI: 10.1039/C7AY00412EVerma C., Tapadia K., Bala Soni A., Sharma A., et al. Determination of bismuth (III) in environmental and pharmaceutical samples using an organic reagent / Anal. Methods. 2017. Vol. 9. N 24. P. 3682–3688. DOI: 10.1039/C7AY00412EBagheban-Shahri F., Niazi A. Chemometrics-enhanced simultaneous spectrophotometric determination of aluminum and bismuth with hematoxylin in vegetables and water using multivariate calibration / J. Water Reuse Desalin. 2016. Vol. 6. N 1. P. 137–147. DOI: 10.2166/wrd.2015.047Bagheban-Shahri F., Niazi A. Chemometrics-enhanced simultaneous spectrophotometric determination of aluminum and bismuth with hematoxylin in vegetables and water using multivariate calibration / J. Water Reuse Desalin. 2016. Vol. 6. N 1. P. 137–147. DOI: 10.2166/wrd.2015.047Shekho N. H., Thunoon E. S. Spectrophotometric Determination of Bismuth (III) with 4-(2-pyridylazo) Resorcinol-Application to Waters and Veterinary Preparation / Baghdad Sci. J. 2013. Vol. 10. N 3. P. 898–906 [in Arabic]. https://www.iasj.net/iasj/article/78100Shekho N. H., Thunoon E. S. Spectrophotometric Determination of Bismuth (III) with 4-(2-pyridylazo) Resorcinol-Application to Waters and Veterinary Preparation / Baghdad Sci. J. 2013. Vol. 10. N 3. P. 898–906 [in Arabic]. https://www.iasj.net/iasj/article/78100Dedkova V. P., Shvoeva O. P., Savvin S. B. Adsorption and determination of bismuth with 4-(2-pyridylazo) resorcinol on a fibrous ion exchanger / J. Anal. Chem. 2010. Vol. 65. N 6. P. 577–581. DOI: 10.1134/S1061934810060055Dedkova V. P., Shvoeva O. P., Savvin S. B. Adsorption and determination of bismuth with 4-(2-pyridylazo) resorcinol on a fibrous ion exchanger / J. Anal. Chem. 2010. Vol. 65. N 6. P. 577–581. DOI: 10.1134/S1061934810060055Mohammad S. A., Mohammed M. M. Spectrophotometric determination of bismuth (III) with arsenazo (III) reagent in water samples and veterinary preparation / Baghdad Sci. J. 2013. Vol. 10. N 3. P. 986–996. https://www.iasj.net/iasj/article/78110Mohammad S. A., Mohammed M. M. Spectrophotometric determination of bismuth (III) with arsenazo (III) reagent in water samples and veterinary preparation / Baghdad Sci. J. 2013. Vol. 10. N 3. P. 986–996. https://www.iasj.net/iasj/article/78110Thanoon E. S., Omer K. M. Spectrophotometric determination of bismuth (III) via pyrocatecol violet dye as chromogenic reagent / J. Univ. Anbar Pure Sci. 2019. Vol. 13. N 1. P. 16–23. https://www.iasj.net/iasj/article/169184Thanoon E. S., Omer K. M. Spectrophotometric determination of bismuth (III) via pyrocatecol violet dye as chromogenic reagent / J. Univ. Anbar Pure Sci. 2019. Vol. 13. N 1. P. 16–23. https://www.iasj.net/iasj/article/169184Bale M. N., Sawant A. D., Shaikh H., Garole D. J. Spectrophotometric Determination of Bi (III) from Alloys and Drugs Samples Using Pyridine-2-carboxaldehyde-2-hydroxybenzoyl- hydrazone / Asian J. Chem. 2017. Vol. 29. N 6. P. 1328–1332. DOI: 10.14233/ajchem.2017.20489Bale M. N., Sawant A. D., Shaikh H., Garole D. J. Spectrophotometric Determination of Bi (III) from Alloys and Drugs Samples Using Pyridine-2-carboxaldehyde-2-hydroxybenzoyl- hydrazone / Asian J. Chem. 2017. Vol. 29. N 6. P. 1328–1332. DOI: 10.14233/ajchem.2017.20489Labhade S. R., Gaikwad V. B. Novel analytical approach for spectrophotometric determination of bismuth through measurement of permittance of the copper-ethylenediaminetetra- acetate absorbing system / Anal. Chem. An Indian J. 2011. Vol. 10. N 2. P. 83–92.Labhade S. R., Gaikwad V. B. Novel analytical approach for spectrophotometric determination of bismuth through measurement of permittance of the copper-ethylenediaminetetra- acetate absorbing system / Anal. Chem. An Indian J. 2011. Vol. 10. N 2. P. 83–92.Mohammed S. A., Mohammed M. M. Spectrophotometric Determination of Bismuth with Alizarine Red S and Cetylpyridinium Chloride-Application to Water Samples, Urine and Veterinary Preparation / Rafidain J. Sci. 2013. Vol. 24. N 9. P. 52–63. DOI: 10.33899/rjs.2013.78759Mohammed S. A., Mohammed M. M. Spectrophotometric Determination of Bismuth with Alizarine Red S and Cetylpyridinium Chloride-Application to Water Samples, Urine and Veterinary Preparation / Rafidain J. Sci. 2013. Vol. 24. N 9. P. 52–63. DOI: 10.33899/rjs.2013.78759Mohammadi S., Khayatian G. Colorimetric detection of Bi (III) in water and drug samples using pyridine-2, 6-dicarboxylic acid modified silver nanoparticles / Spectrochim. Acta. Part A. 2015. Vol. 148. P. 405–411. DOI: 10.1016/j.saa.2015.03.127Mohammadi S., Khayatian G. Colorimetric detection of Bi (III) in water and drug samples using pyridine-2, 6-dicarboxylic acid modified silver nanoparticles / Spectrochim. Acta. Part A. 2015. Vol. 148. P. 405–411. DOI: 10.1016/j.saa.2015.03.127Zhang E., Ju P., Li Q., et al. A novel rhodamine 6G-based fluorescent and colorimetric probe for Bi3+: Synthesis, selectivity, sensitivity and potential applications / Sens. Actuators B. 2018. Vol. 260. P. 204–212. DOI: 10.1016/j.snb.2017.12.109Zhang E., Ju P., Li Q., et al. A novel rhodamine 6G-based fluorescent and colorimetric probe for Bi3+: Synthesis, selectivity, sensitivity and potential applications / Sens. Actuators B. 2018. Vol. 260. P. 204–212. DOI: 10.1016/j.snb.2017.12.109Nagiev H. D., Alieva R. A., Alekberov J. A., et al. Spectrophotometric Determination of bismuth (III) with 2,3,4-trihydroxy-4’-sulfoazobenzene / Zavod. Lab. Diagn. Mater. 2015. Vol. 81. N 2. P. 25–27 [in Russian].Nagiev H. D., Alieva R. A., Alekberov J. A., et al. Spectrophotometric Determination of bismuth (III) with 2,3,4-trihydroxy-4’-sulfoazobenzene / Zavod. Lab. Diagn. Mater. 2015. Vol. 81. N 2. P. 25–27 [in Russian].Nagiev Kh. D., Magerramov A. M., Alekberov J. A., et al. The spectrophotometric determination of mixed-lignd complex of bismuth (III) with 2,3,4-trihydroxyphenilazo-5’-sulfo-naph- talene and cetylpyridinum bromide / Azerb. Khim. Zh. 2014. Vol. 1. P. 52–56 [in Russian].Nagiev Kh. D., Magerramov A. M., Alekberov J. A., et al. The spectrophotometric determination of mixed-lignd complex of bismuth (III) with 2,3,4-trihydroxyphenilazo-5’-sulfo-naph- talene and cetylpyridinum bromide / Azerb. Khim. Zh. 2014. Vol. 1. P. 52–56 [in Russian].Chebotarev A. N., Snigur D. V., Barbalat D. A., et al. Complexation of 6,7-dihydroxy-2,4-diphenylbenzopiriliym with Bi (III) and its spectrophotometry determination in pharmaceuticals / Vopr. Khim. Tekhnol. 2017. N 1(110). P. 36–42 [in Russian]. http://dspace.onu.edu.ua:8080/handle/123456789/13031Chebotarev A. N., Snigur D. V., Barbalat D. A., et al. Complexation of 6,7-dihydroxy-2,4-diphenylbenzopiriliym with Bi (III) and its spectrophotometry determination in pharmaceuticals / Vopr. Khim. Tekhnol. 2017. N 1(110). P. 36–42 [in Russian]. http://dspace.onu.edu.ua:8080/handle/123456789/13031Madusmanova N. K. Photometric determination of bismuth using the reagent 1-(5-methul-2-pyridylazo)-5-diethylamino- phenol / Vest. Nauki Obrazov. 2020. N 89(II). P. 18 – 21 [in Russian].Madusmanova N. K. Photometric determination of bismuth using the reagent 1-(5-methul-2-pyridylazo)-5-diethylamino- phenol / Vest. Nauki Obrazov. 2020. N 89(II). P. 18 – 21 [in Russian].Rančić S. M., Nikolić-Mandić S. D. Kinetic spectrophotometric determination of Bi (III) based on its catalytic effect on the oxidation of phenylfluorone by hydrogen peroxide / J. Serb. Chem. Soc. 2009. Vol. 74. N 8–9. P. 977–984. DOI: 10.2298/JSC0909977RRančić S. M., Nikolić-Mandić S. D. Kinetic spectrophotometric determination of Bi (III) based on its catalytic effect on the oxidation of phenylfluorone by hydrogen peroxide / J. Serb. Chem. Soc. 2009. Vol. 74. N 8–9. P. 977–984. DOI: 10.2298/JSC0909977RHedjazi M., Vishnikin A. B., Okovytyy S. I., et al. Use of dye aggregation phenomenon for spectrophotometric and SIA-LAV determination of bismuth (III) as a specific ion association complex between tetraiodobismuthate and Astra Phloxine / J. Mol. Struct. 2022. Vol. 1251. P. 132015. DOI: 10.1016/j.molstruc.2021.132015Hedjazi M., Vishnikin A. B., Okovytyy S. I., et al. Use of dye aggregation phenomenon for spectrophotometric and SIA-LAV determination of bismuth (III) as a specific ion association complex between tetraiodobismuthate and Astra Phloxine / J. Mol. Struct. 2022. Vol. 1251. P. 132015. DOI: 10.1016/j.molstruc.2021.132015

The authors declare that there are no conflicts of interest present.