Catalytic Adsorptive Stripping Voltammetric Determination of Germanium Employing the Oxidizing Properties of V(IV)-HEDTA Complex and Bismuth-Modified Carbon-Based Electrodes
An efficient procedure that may be used to determine germanium traces and combines the advantages of catalytic adsorptive stripping voltammetry (CAdSV) with the convenience of screen-printed electrodes was developed. To induce the CAdSV response of the germanium(IV)-catechol complex, the vanadium(IV...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-07-01
|
| Series: | Membranes |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2077-0375/11/7/524 |
| _version_ | 1797526563012476928 |
|---|---|
| author | Agnieszka Królicka Jerzy Zarębski Andrzej Bobrowski |
| author_facet | Agnieszka Królicka Jerzy Zarębski Andrzej Bobrowski |
| author_sort | Agnieszka Królicka |
| collection | DOAJ |
| description | An efficient procedure that may be used to determine germanium traces and combines the advantages of catalytic adsorptive stripping voltammetry (CAdSV) with the convenience of screen-printed electrodes was developed. To induce the CAdSV response of the germanium(IV)-catechol complex, the vanadium(IV)-HEDTA compound was employed in combination with various bismuth-modified homogeneous (glassy carbon, gold coated with a bismuth layer via physical vapor deposition) and heterogeneous (screen-printed carbon, mesoporous carbon, graphene and reduced graphene oxide, polymer-encapsuled carbon fiber) electrodes. This solution had never before been implemented for this purpose. To achieve the most favorable performance of the working electrode, the parameters of bismuth deposition were optimized using a central composite design methodology. SEM imaging and contact angle measurements confirmed the long-term stability and high chemical resistance of the electrodes against the oxidizing action of V(IV)-HEDTA. Under optimized conditions, the method made it possible to detect nanomolar concentrations of germanium with favorable detection limits, high sensitivity, and a wide linear range of 5–90 nM of Ge(IV). |
| first_indexed | 2024-03-10T09:32:04Z |
| format | Article |
| id | doaj.art-04ef6433fb144177b4d3ada9350d5382 |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-10T09:32:04Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-04ef6433fb144177b4d3ada9350d53822023-11-22T04:22:19ZengMDPI AGMembranes2077-03752021-07-0111752410.3390/membranes11070524Catalytic Adsorptive Stripping Voltammetric Determination of Germanium Employing the Oxidizing Properties of V(IV)-HEDTA Complex and Bismuth-Modified Carbon-Based ElectrodesAgnieszka Królicka0Jerzy Zarębski1Andrzej Bobrowski2Department of Building Materials Technology, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Mickiewicza 30, 30-059 Krakow, PolandDepartment of Building Materials Technology, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Mickiewicza 30, 30-059 Krakow, PolandDepartment of Building Materials Technology, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Mickiewicza 30, 30-059 Krakow, PolandAn efficient procedure that may be used to determine germanium traces and combines the advantages of catalytic adsorptive stripping voltammetry (CAdSV) with the convenience of screen-printed electrodes was developed. To induce the CAdSV response of the germanium(IV)-catechol complex, the vanadium(IV)-HEDTA compound was employed in combination with various bismuth-modified homogeneous (glassy carbon, gold coated with a bismuth layer via physical vapor deposition) and heterogeneous (screen-printed carbon, mesoporous carbon, graphene and reduced graphene oxide, polymer-encapsuled carbon fiber) electrodes. This solution had never before been implemented for this purpose. To achieve the most favorable performance of the working electrode, the parameters of bismuth deposition were optimized using a central composite design methodology. SEM imaging and contact angle measurements confirmed the long-term stability and high chemical resistance of the electrodes against the oxidizing action of V(IV)-HEDTA. Under optimized conditions, the method made it possible to detect nanomolar concentrations of germanium with favorable detection limits, high sensitivity, and a wide linear range of 5–90 nM of Ge(IV).https://www.mdpi.com/2077-0375/11/7/524germanium determinationvanadium(IV)-HEDTA complexcatalytic adsorptive stripping voltammetry (CAdSV)bismuth filmglassy carbonscreen-printed electrodes |
| spellingShingle | Agnieszka Królicka Jerzy Zarębski Andrzej Bobrowski Catalytic Adsorptive Stripping Voltammetric Determination of Germanium Employing the Oxidizing Properties of V(IV)-HEDTA Complex and Bismuth-Modified Carbon-Based Electrodes Membranes germanium determination vanadium(IV)-HEDTA complex catalytic adsorptive stripping voltammetry (CAdSV) bismuth film glassy carbon screen-printed electrodes |
| title | Catalytic Adsorptive Stripping Voltammetric Determination of Germanium Employing the Oxidizing Properties of V(IV)-HEDTA Complex and Bismuth-Modified Carbon-Based Electrodes |
| title_full | Catalytic Adsorptive Stripping Voltammetric Determination of Germanium Employing the Oxidizing Properties of V(IV)-HEDTA Complex and Bismuth-Modified Carbon-Based Electrodes |
| title_fullStr | Catalytic Adsorptive Stripping Voltammetric Determination of Germanium Employing the Oxidizing Properties of V(IV)-HEDTA Complex and Bismuth-Modified Carbon-Based Electrodes |
| title_full_unstemmed | Catalytic Adsorptive Stripping Voltammetric Determination of Germanium Employing the Oxidizing Properties of V(IV)-HEDTA Complex and Bismuth-Modified Carbon-Based Electrodes |
| title_short | Catalytic Adsorptive Stripping Voltammetric Determination of Germanium Employing the Oxidizing Properties of V(IV)-HEDTA Complex and Bismuth-Modified Carbon-Based Electrodes |
| title_sort | catalytic adsorptive stripping voltammetric determination of germanium employing the oxidizing properties of v iv hedta complex and bismuth modified carbon based electrodes |
| topic | germanium determination vanadium(IV)-HEDTA complex catalytic adsorptive stripping voltammetry (CAdSV) bismuth film glassy carbon screen-printed electrodes |
| url | https://www.mdpi.com/2077-0375/11/7/524 |
| work_keys_str_mv | AT agnieszkakrolicka catalyticadsorptivestrippingvoltammetricdeterminationofgermaniumemployingtheoxidizingpropertiesofvivhedtacomplexandbismuthmodifiedcarbonbasedelectrodes AT jerzyzarebski catalyticadsorptivestrippingvoltammetricdeterminationofgermaniumemployingtheoxidizingpropertiesofvivhedtacomplexandbismuthmodifiedcarbonbasedelectrodes AT andrzejbobrowski catalyticadsorptivestrippingvoltammetricdeterminationofgermaniumemployingtheoxidizingpropertiesofvivhedtacomplexandbismuthmodifiedcarbonbasedelectrodes |