A novel flow injection amperometric method for sensitive determination of total antioxidant capacity at cupric-neocuproine complex modified MWCNT glassy carbon electrode
A novel amperometric method is presented for the determination of total antioxidant capacity in flow injection analysis (FIA) system using copper(II)-neocuproine complex modified on Nafion-functionalized multi-walled carbon nanotube-glassy carbon electrode ([Cu(Ncp) 2 2+ ]/Nf@ f -MWCNT/GCE). Cyclic...
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| Veröffentlicht in: | Mikrochimica acta (1966) 2022-04, Vol.189 (4), p.167, Article 167 |
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| creator | Ayaz, Selen Üzer, Ayşem Dilgin, Yusuf Apak, Reşat |
| description | A novel amperometric method is presented for the determination of total antioxidant capacity in flow injection analysis (FIA) system using copper(II)-neocuproine complex modified on Nafion-functionalized multi-walled carbon nanotube-glassy carbon electrode ([Cu(Ncp)
2
2+
]/Nf@
f
-MWCNT/GCE). Cyclic voltammetric studies showed that the modified electrode exhibits a very well-formed reversible redox couple for Cu(II)-/Cu(I)-complex. In addition, the [Cu(Ncp)
2
2+
]/[Cu(Ncp)
2
+
] redox pair shows very good electrocatalytic activity towards the oxidation of polyphenolic compounds (PPhCs) such as trolox, catechin, and quercetin due to the enhancement of the anodic peak current of the redox couple in the presence of these analytes. This electrocatalytic oxidation current at the [Cu(Ncp)
2
2+
]/Nf@
f
-MWCNT/GCE was used for flow injection (FI) amperometric determination of PPhCs. FI amperometric-time curves recorded under optimized conditions (applied potential: + 0.6 V vs. Ag/AgCl/KCl
(0.10 M)
, flow rate: 2 mL/min) showed that the proposed electrode had a wide linear range (LR) with a very low detection limit (LOD) for PPhCs. LR and LOD were 0.5–800 and 0.2 µM for trolox, respectively and 0.50–250 and 0.14 µM, respectively, for both quercetin and catechin. This sensitive method was successfully applied to the amperometric measurement of total antioxidant capacity (TAC) of some herbal teas, giving compatible results with the spectrophotometric CUPRAC method. The proposed method gave higher rank to fast-reacting antioxidants; it was equally precise but had a wider linear range and lower LOD than the spectrophotometric CUPRAC assay (e.g., LOD for ascorbic acid and gallic acid were 0.07 and 0.08 μM, respectively), and similar electroanalytical methods using the CUPRAC reagent.
Graphical abstract |
| doi_str_mv | 10.1007/s00604-022-05271-z |
| format | Article |
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2
2+
]/Nf@
f
-MWCNT/GCE). Cyclic voltammetric studies showed that the modified electrode exhibits a very well-formed reversible redox couple for Cu(II)-/Cu(I)-complex. In addition, the [Cu(Ncp)
2
2+
]/[Cu(Ncp)
2
+
] redox pair shows very good electrocatalytic activity towards the oxidation of polyphenolic compounds (PPhCs) such as trolox, catechin, and quercetin due to the enhancement of the anodic peak current of the redox couple in the presence of these analytes. This electrocatalytic oxidation current at the [Cu(Ncp)
2
2+
]/Nf@
f
-MWCNT/GCE was used for flow injection (FI) amperometric determination of PPhCs. FI amperometric-time curves recorded under optimized conditions (applied potential: + 0.6 V vs. Ag/AgCl/KCl
(0.10 M)
, flow rate: 2 mL/min) showed that the proposed electrode had a wide linear range (LR) with a very low detection limit (LOD) for PPhCs. LR and LOD were 0.5–800 and 0.2 µM for trolox, respectively and 0.50–250 and 0.14 µM, respectively, for both quercetin and catechin. This sensitive method was successfully applied to the amperometric measurement of total antioxidant capacity (TAC) of some herbal teas, giving compatible results with the spectrophotometric CUPRAC method. The proposed method gave higher rank to fast-reacting antioxidants; it was equally precise but had a wider linear range and lower LOD than the spectrophotometric CUPRAC assay (e.g., LOD for ascorbic acid and gallic acid were 0.07 and 0.08 μM, respectively), and similar electroanalytical methods using the CUPRAC reagent.
Graphical abstract</description><identifier>ISSN: 0026-3672</identifier><identifier>ISSN: 1436-5073</identifier><identifier>EISSN: 1436-5073</identifier><identifier>DOI: 10.1007/s00604-022-05271-z</identifier><identifier>PMID: 35359164</identifier><language>eng</language><publisher>Vienna: Springer Vienna</publisher><subject>Analytical Chemistry ; Antioxidants ; Ascorbic acid ; Carbon ; Catechin ; Characterization and Evaluation of Materials ; Chemistry ; Chemistry and Materials Science ; Coordination compounds ; Copper ; Copper compounds ; Electrical measurement ; Electrodes ; Flow injection analysis ; Flow velocity ; Gallic acid ; Glassy carbon ; Herbal tea ; Methods ; Microengineering ; Multi wall carbon nanotubes ; Nanochemistry ; Nanotechnology ; Nanotubes ; Original Paper ; Oxidation ; Oxidation-Reduction ; Phenanthrolines ; Rankings ; Reagents ; Spectrophotometry</subject><ispartof>Mikrochimica acta (1966), 2022-04, Vol.189 (4), p.167, Article 167</ispartof><rights>The Author(s), under exclusive licence to Springer-Verlag GmbH Austria, part of Springer Nature 2022</rights><rights>2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Austria, part of Springer Nature.</rights><rights>COPYRIGHT 2022 Springer</rights><rights>The Author(s), under exclusive licence to Springer-Verlag GmbH Austria, part of Springer Nature 2022.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c372t-67b37d81208beb59ff2e847dcdcfabfef9880547ccbf9bfbd2f53704fe7be90c3</citedby><cites>FETCH-LOGICAL-c372t-67b37d81208beb59ff2e847dcdcfabfef9880547ccbf9bfbd2f53704fe7be90c3</cites><orcidid>0000-0002-2980-6871</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s00604-022-05271-z$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s00604-022-05271-z$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27903,27904,41467,42536,51297</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/35359164$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Ayaz, Selen</creatorcontrib><creatorcontrib>Üzer, Ayşem</creatorcontrib><creatorcontrib>Dilgin, Yusuf</creatorcontrib><creatorcontrib>Apak, Reşat</creatorcontrib><title>A novel flow injection amperometric method for sensitive determination of total antioxidant capacity at cupric-neocuproine complex modified MWCNT glassy carbon electrode</title><title>Mikrochimica acta (1966)</title><addtitle>Microchim Acta</addtitle><addtitle>Mikrochim Acta</addtitle><description>A novel amperometric method is presented for the determination of total antioxidant capacity in flow injection analysis (FIA) system using copper(II)-neocuproine complex modified on Nafion-functionalized multi-walled carbon nanotube-glassy carbon electrode ([Cu(Ncp)
2
2+
]/Nf@
f
-MWCNT/GCE). Cyclic voltammetric studies showed that the modified electrode exhibits a very well-formed reversible redox couple for Cu(II)-/Cu(I)-complex. In addition, the [Cu(Ncp)
2
2+
]/[Cu(Ncp)
2
+
] redox pair shows very good electrocatalytic activity towards the oxidation of polyphenolic compounds (PPhCs) such as trolox, catechin, and quercetin due to the enhancement of the anodic peak current of the redox couple in the presence of these analytes. This electrocatalytic oxidation current at the [Cu(Ncp)
2
2+
]/Nf@
f
-MWCNT/GCE was used for flow injection (FI) amperometric determination of PPhCs. FI amperometric-time curves recorded under optimized conditions (applied potential: + 0.6 V vs. Ag/AgCl/KCl
(0.10 M)
, flow rate: 2 mL/min) showed that the proposed electrode had a wide linear range (LR) with a very low detection limit (LOD) for PPhCs. LR and LOD were 0.5–800 and 0.2 µM for trolox, respectively and 0.50–250 and 0.14 µM, respectively, for both quercetin and catechin. This sensitive method was successfully applied to the amperometric measurement of total antioxidant capacity (TAC) of some herbal teas, giving compatible results with the spectrophotometric CUPRAC method. The proposed method gave higher rank to fast-reacting antioxidants; it was equally precise but had a wider linear range and lower LOD than the spectrophotometric CUPRAC assay (e.g., LOD for ascorbic acid and gallic acid were 0.07 and 0.08 μM, respectively), and similar electroanalytical methods using the CUPRAC reagent.
Graphical abstract</description><subject>Analytical Chemistry</subject><subject>Antioxidants</subject><subject>Ascorbic acid</subject><subject>Carbon</subject><subject>Catechin</subject><subject>Characterization and Evaluation of Materials</subject><subject>Chemistry</subject><subject>Chemistry and Materials Science</subject><subject>Coordination compounds</subject><subject>Copper</subject><subject>Copper compounds</subject><subject>Electrical measurement</subject><subject>Electrodes</subject><subject>Flow injection analysis</subject><subject>Flow velocity</subject><subject>Gallic acid</subject><subject>Glassy carbon</subject><subject>Herbal tea</subject><subject>Methods</subject><subject>Microengineering</subject><subject>Multi wall carbon nanotubes</subject><subject>Nanochemistry</subject><subject>Nanotechnology</subject><subject>Nanotubes</subject><subject>Original Paper</subject><subject>Oxidation</subject><subject>Oxidation-Reduction</subject><subject>Phenanthrolines</subject><subject>Rankings</subject><subject>Reagents</subject><subject>Spectrophotometry</subject><issn>0026-3672</issn><issn>1436-5073</issn><issn>1436-5073</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp9ks1u1DAUhSMEokPhBVggS2zYpDh2YifL0aj8SAU2RSwtx74ePErswfaUTt-It-ROp1CBEMriOs53To6tU1XPG3rWUCpfZ0oFbWvKWE07Jpv65kG1aFou6o5K_rBaUMpEzYVkJ9WTnDeUNlKw9nF1wjveDY1oF9WPJQnxCibipvid-LABU3wMRM9bSHGGkrwhOL5GS1xMJEPIvvgrIBYKpNkHfctHR0oseiI64Pu1tziJ0VttfNkTjevdFq3qAPGwij4AMXHeTnBN5mi982DJhy-rj5dkPemc9yhOIxrDhIlStPC0euT0lOHZ3TytPr85v1y9qy8-vX2_Wl7UhktWaiFHLm3fMNqPMHaDcwz6VlpjjdOjAzf0Pe1aaczohtGNlrmOS9o6kCMM1PDT6tXRF1N-20EuavbZwDRpzL7LiokWb5SJgSL68i90E3cpYLoD1fWy70R7T631BMoHF0vS5mCqlvhjTjvBBqTO_kHhY2H2JgZwHvf_ELCjwKSYcwKn8IJnnfaqoerQD3Xsh8J-qNt-qBsUvbhLvBtnsL8lvwqBAD8CGT-FNaT7I_3H9idausor</recordid><startdate>20220401</startdate><enddate>20220401</enddate><creator>Ayaz, Selen</creator><creator>Üzer, Ayşem</creator><creator>Dilgin, Yusuf</creator><creator>Apak, Reşat</creator><general>Springer Vienna</general><general>Springer</general><general>Springer Nature B.V</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>K9.</scope><scope>7X8</scope><orcidid>https://orcid.org/0000-0002-2980-6871</orcidid></search><sort><creationdate>20220401</creationdate><title>A novel flow injection amperometric method for sensitive determination of total antioxidant capacity at cupric-neocuproine complex modified MWCNT glassy carbon electrode</title><author>Ayaz, Selen ; Üzer, Ayşem ; Dilgin, Yusuf ; Apak, Reşat</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c372t-67b37d81208beb59ff2e847dcdcfabfef9880547ccbf9bfbd2f53704fe7be90c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Analytical Chemistry</topic><topic>Antioxidants</topic><topic>Ascorbic acid</topic><topic>Carbon</topic><topic>Catechin</topic><topic>Characterization and Evaluation of Materials</topic><topic>Chemistry</topic><topic>Chemistry and Materials Science</topic><topic>Coordination compounds</topic><topic>Copper</topic><topic>Copper compounds</topic><topic>Electrical measurement</topic><topic>Electrodes</topic><topic>Flow injection analysis</topic><topic>Flow velocity</topic><topic>Gallic acid</topic><topic>Glassy carbon</topic><topic>Herbal tea</topic><topic>Methods</topic><topic>Microengineering</topic><topic>Multi wall carbon nanotubes</topic><topic>Nanochemistry</topic><topic>Nanotechnology</topic><topic>Nanotubes</topic><topic>Original Paper</topic><topic>Oxidation</topic><topic>Oxidation-Reduction</topic><topic>Phenanthrolines</topic><topic>Rankings</topic><topic>Reagents</topic><topic>Spectrophotometry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ayaz, Selen</creatorcontrib><creatorcontrib>Üzer, Ayşem</creatorcontrib><creatorcontrib>Dilgin, Yusuf</creatorcontrib><creatorcontrib>Apak, Reşat</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>MEDLINE - Academic</collection><jtitle>Mikrochimica acta (1966)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ayaz, Selen</au><au>Üzer, Ayşem</au><au>Dilgin, Yusuf</au><au>Apak, Reşat</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A novel flow injection amperometric method for sensitive determination of total antioxidant capacity at cupric-neocuproine complex modified MWCNT glassy carbon electrode</atitle><jtitle>Mikrochimica acta (1966)</jtitle><stitle>Microchim Acta</stitle><addtitle>Mikrochim Acta</addtitle><date>2022-04-01</date><risdate>2022</risdate><volume>189</volume><issue>4</issue><spage>167</spage><pages>167-</pages><artnum>167</artnum><issn>0026-3672</issn><issn>1436-5073</issn><eissn>1436-5073</eissn><abstract>A novel amperometric method is presented for the determination of total antioxidant capacity in flow injection analysis (FIA) system using copper(II)-neocuproine complex modified on Nafion-functionalized multi-walled carbon nanotube-glassy carbon electrode ([Cu(Ncp)
2
2+
]/Nf@
f
-MWCNT/GCE). Cyclic voltammetric studies showed that the modified electrode exhibits a very well-formed reversible redox couple for Cu(II)-/Cu(I)-complex. In addition, the [Cu(Ncp)
2
2+
]/[Cu(Ncp)
2
+
] redox pair shows very good electrocatalytic activity towards the oxidation of polyphenolic compounds (PPhCs) such as trolox, catechin, and quercetin due to the enhancement of the anodic peak current of the redox couple in the presence of these analytes. This electrocatalytic oxidation current at the [Cu(Ncp)
2
2+
]/Nf@
f
-MWCNT/GCE was used for flow injection (FI) amperometric determination of PPhCs. FI amperometric-time curves recorded under optimized conditions (applied potential: + 0.6 V vs. Ag/AgCl/KCl
(0.10 M)
, flow rate: 2 mL/min) showed that the proposed electrode had a wide linear range (LR) with a very low detection limit (LOD) for PPhCs. LR and LOD were 0.5–800 and 0.2 µM for trolox, respectively and 0.50–250 and 0.14 µM, respectively, for both quercetin and catechin. This sensitive method was successfully applied to the amperometric measurement of total antioxidant capacity (TAC) of some herbal teas, giving compatible results with the spectrophotometric CUPRAC method. The proposed method gave higher rank to fast-reacting antioxidants; it was equally precise but had a wider linear range and lower LOD than the spectrophotometric CUPRAC assay (e.g., LOD for ascorbic acid and gallic acid were 0.07 and 0.08 μM, respectively), and similar electroanalytical methods using the CUPRAC reagent.
Graphical abstract</abstract><cop>Vienna</cop><pub>Springer Vienna</pub><pmid>35359164</pmid><doi>10.1007/s00604-022-05271-z</doi><orcidid>https://orcid.org/0000-0002-2980-6871</orcidid></addata></record> |
| fulltext | fulltext |
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| ispartof | Mikrochimica acta (1966), 2022-04, Vol.189 (4), p.167, Article 167 |
| issn | 0026-3672 1436-5073 1436-5073 |
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| source | MEDLINE; SpringerLink (Online service) |
| subjects | Analytical Chemistry Antioxidants Ascorbic acid Carbon Catechin Characterization and Evaluation of Materials Chemistry Chemistry and Materials Science Coordination compounds Copper Copper compounds Electrical measurement Electrodes Flow injection analysis Flow velocity Gallic acid Glassy carbon Herbal tea Methods Microengineering Multi wall carbon nanotubes Nanochemistry Nanotechnology Nanotubes Original Paper Oxidation Oxidation-Reduction Phenanthrolines Rankings Reagents Spectrophotometry |
| title | A novel flow injection amperometric method for sensitive determination of total antioxidant capacity at cupric-neocuproine complex modified MWCNT glassy carbon electrode |
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