Elemental Analysis with Sorption Preconcentration by Graphene Oxide for Mineral Water by Inductively Coupled Plasma – Optical Emission and Mass Spectrometries (ICP-OES and ICP-MS)

Abstract

The paper discusses using sorption preconcentration of elements from mineral waters by graphene oxide. The procedure aims to extract heavy metals such as Cd, Cr, Cu, Pb, Zn and other analytes from solution. Inductively coupled plasma – mass spectrometry (ICP-MS) and inductively coupled plasma – optical emission spectrometry (ICP-OES) were used to determine the analyte content. Graphene oxide was obtained by microwave exfoliation of graphite oxide. The sorption of analytes on the graphene oxide at different pH values and coexisting ion effect were studied in detail. Preliminary preconcentration of analytes provides good extraction recoveries using the optimal conditions. The limits of detection (LODs) of 27 analytes for the developed procedure ranged 0.1 to 200 ng L⁻¹ for ICP-MS and from 5 to 1000 ng L⁻¹ for ICP-OES. Sorption concentration provides recoveries of analytes from 80 to 110%. Graphene oxide was successfully employed for the sorption preconcentration of analytes from mineral and tap water.

Keywords:

• Graphene oxide
• heavy metals
• inductively coupled plasma – mass spectrometry (ICP-MS)
• inductively coupled plasma – optical emission spectrometry (ICP-OES)
• sorption preconcentration

Disclosure statement

The authors declare no competing financial interests.

Additional information

Funding

The study was funded by the Russian Science Foundation, project № 23-23-00058, https://rscf.ru/en/project/23-23-00058/.