TY - JOUR

T1 - Microwave Exfoliated Graphene Oxide for Sorption Concentration of Gold and Silver

AU - Frolova, Alexandra O.

AU - Volzhenin, Artem V.

AU - Medvedev, Nickolay S.

AU - Makotchenko, Viktor G.

AU - Saprykin, Anatoly I.

N1 - The study was funded by the Russian Science Foundation, project № 23-23-00058, https://rscf.ru/en/project/23-23-00058/

PY - 2024

Y1 - 2024

N2 - A method has been reported for determining of Au and Ag in waters using preliminary sorption concentration of these analytes by microwave exfoliated graphene oxide (GO) and quantitative analysis by two-jet arc plasma atomic emission spectrometry (TJP-AES) and graphite furnace atomic absorption spectrometry (GFAAS). The parameters of sorption of analytes such as duration of sorption and pH were optimized for the preliminary concentration of Au and Ag on various carbon sorbents for subsequent TJP-AES and GFAAS analysis. The sorption properties of carbon nanotubes (CNTs), multilayer graphene (MLG) and GO such as sorption capacity and surface area were compared. The content of analytes in sorption materials was defined. The results demonstrated that GO provides the best sorption properties and the use of exfoliated GO for preconcentration decreaces the blank signal from nonselective absorption by 10 to 120 times. The limits of detection (LODs) for Au and Ag are 4·10−1µg L−1 and 8·10−2µg L−1 by GFAAS and 5 µg L−1 and 2·10−1µg L−1 by TJP-AES.

AB - A method has been reported for determining of Au and Ag in waters using preliminary sorption concentration of these analytes by microwave exfoliated graphene oxide (GO) and quantitative analysis by two-jet arc plasma atomic emission spectrometry (TJP-AES) and graphite furnace atomic absorption spectrometry (GFAAS). The parameters of sorption of analytes such as duration of sorption and pH were optimized for the preliminary concentration of Au and Ag on various carbon sorbents for subsequent TJP-AES and GFAAS analysis. The sorption properties of carbon nanotubes (CNTs), multilayer graphene (MLG) and GO such as sorption capacity and surface area were compared. The content of analytes in sorption materials was defined. The results demonstrated that GO provides the best sorption properties and the use of exfoliated GO for preconcentration decreaces the blank signal from nonselective absorption by 10 to 120 times. The limits of detection (LODs) for Au and Ag are 4·10−1µg L−1 and 8·10−2µg L−1 by GFAAS and 5 µg L−1 and 2·10−1µg L−1 by TJP-AES.

KW - Carbon sorbents

KW - graphite furnace atomic absorption spectrometry (GFAAS)

KW - noble metals

KW - sorption preconcentration

KW - two-jet arc plasma atomic emission spectrometry (TJP-AES)

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85188097850&origin=inward&txGid=4ac61ee94edc0a93ea366e193715f185

UR - https://www.mendeley.com/catalogue/92784e89-73e4-3762-bbf0-0069d0e4ba8d/

U2 - 10.1080/00032719.2024.2323679

DO - 10.1080/00032719.2024.2323679

M3 - Article

JO - Analytical Letters

JF - Analytical Letters

SN - 0003-2719

ER -