TY - JOUR

T1 - Sorption Preconcentration of Heavy Metals on Graphene Oxide for Analysis of Waters by Electrothermal Vaporization ICP-OES

AU - Medvedev, Nikolay S.

AU - Frolova, Alexandra O.

AU - Kurbatova, Valeriya D.

AU - Guselnikova, Tatiana Ya

AU - Makotchenko, Viktor G.

AU - Saprykin, Anatolij I.

N1 - This work was supported by the Russian Science Foundation, project N\u00BA 23-23-00058, https://rscf.ru/en/project/23-23-00058/ Sorption Preconcentration of Heavy Metals on Graphene Oxide for Analysis of Waters by Electrothermal Vaporization ICP-OES / N. S. Medvedev, A. O. Frolova, V. D. Kurbatova [et al.] // Current Analytical Chemistry. – 2025. – Vol. 21. – DOI 10.2174/0115734110354995241226204921.

PY - 2025/1/20

Y1 - 2025/1/20

N2 - Background: Heavy metals (HMs) such as Cr, Hg, Pb, etc., are major threats to human health due to their toxic and carcinogenic properties. So, the determination of HMs concentrations in waters is an actual and important task. Methods: In this paper, the method includes a preliminary concentration of HMs and other analytes (Ag, Au, Ba, Be, Bi, Cr, Hg, In, Pb, Sn, and Zn) from water solutions on the graphene oxide and subsequent analysis of slurries of sorbent by electrothermal vaporization inductively coupled plasma optical emission spectrometry (ETV-ICP-OES) is developed for the first time. Results: The high efficiency of analytes sorption on graphene oxide made it possible to significantly increase the sensitivity of the analysis. The limits of detection of Ag, Au, Ba, Be, Bi, Cr, Hg, In, Pb, Sn, and Zn from 0.7 to 300 ng L-1 are achieved for ETV-ICP-OES analysis. The use of electrothermal vaporization for sample introduction allows the analysis of sorbent suspensions and avoids the desorption stage, reduces sample dilution, increases the preconcentration factor, and improves limits of detection (LODs) of analytes by 2-33 times compared to routine inductively coupled plasma optical emission spectrometry analysis (ICP-OES) with sorption preconcentration. Conclusion: For Ba, Be, Bi, Cr, In, Pb, Sn, and Zn ETV-ICP-OES provides LODs from 2 to 33 times lower compared to conventional ICP-OES analysis with sorption preconcentration due to higher preconcentration factor and transport efficiency of introducing of the analytes concentrates into the ICP. The developed method was applied to the analysis of real tap and mineral water samples. The results of analysis by ETV-ICP-OES with preconcentration of trace elements and ICP-OES were in good agreement. As a result of lower LODs of analytes, ETV-ICP-OES analysis provides the determination of concentrations of Ba, Bi, Sn, and Pb in tap and mineral water samples.

AB - Background: Heavy metals (HMs) such as Cr, Hg, Pb, etc., are major threats to human health due to their toxic and carcinogenic properties. So, the determination of HMs concentrations in waters is an actual and important task. Methods: In this paper, the method includes a preliminary concentration of HMs and other analytes (Ag, Au, Ba, Be, Bi, Cr, Hg, In, Pb, Sn, and Zn) from water solutions on the graphene oxide and subsequent analysis of slurries of sorbent by electrothermal vaporization inductively coupled plasma optical emission spectrometry (ETV-ICP-OES) is developed for the first time. Results: The high efficiency of analytes sorption on graphene oxide made it possible to significantly increase the sensitivity of the analysis. The limits of detection of Ag, Au, Ba, Be, Bi, Cr, Hg, In, Pb, Sn, and Zn from 0.7 to 300 ng L-1 are achieved for ETV-ICP-OES analysis. The use of electrothermal vaporization for sample introduction allows the analysis of sorbent suspensions and avoids the desorption stage, reduces sample dilution, increases the preconcentration factor, and improves limits of detection (LODs) of analytes by 2-33 times compared to routine inductively coupled plasma optical emission spectrometry analysis (ICP-OES) with sorption preconcentration. Conclusion: For Ba, Be, Bi, Cr, In, Pb, Sn, and Zn ETV-ICP-OES provides LODs from 2 to 33 times lower compared to conventional ICP-OES analysis with sorption preconcentration due to higher preconcentration factor and transport efficiency of introducing of the analytes concentrates into the ICP. The developed method was applied to the analysis of real tap and mineral water samples. The results of analysis by ETV-ICP-OES with preconcentration of trace elements and ICP-OES were in good agreement. As a result of lower LODs of analytes, ETV-ICP-OES analysis provides the determination of concentrations of Ba, Bi, Sn, and Pb in tap and mineral water samples.

KW - Heavy metals

KW - analytes

KW - electrothermal vaporization

KW - graphene oxide

KW - inductively coupled plasma

KW - limits of detection

KW - optical emission spectrometry

KW - sorption preconcentration

UR - https://www.mendeley.com/catalogue/2387ffa2-5bba-3d9b-bd7b-1911ec7c10fc/

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-105005090054&origin=inward&txGid=477254b8de9409f876af22855eada467

UR - https://www.elibrary.ru/item.asp?id=81139386

U2 - 10.2174/0115734110354995241226204921

DO - 10.2174/0115734110354995241226204921

M3 - Article

VL - 21

JO - Current Analytical Chemistry

JF - Current Analytical Chemistry

SN - 1875-6727

ER -