Electrochemical sensing using magnetic molecularly imprinted polymer particles previously captured by a magneto-sensor

Author(s)

Ruiz-Cordova, Gerson A. ^{[1, 2, 3]} ; Khan, Sabir ^{[1, 3]} ; Goncalves, Luis Moreira ^{[4, 5]} ; Pividori, Maria Isabel ^[6] ; Picasso, Gino ^[2] ; Sotomayor, Maria Del Pilar T. ^{[1, 3]}

Affiliation

^[1] UNESP Univ Estadual Paulista, Inst Chem, Dept Analyt Chem, Araraquara, SP - Brazil

^[2] Natl Univ Engn, Fac Sci, Lab Phys Chem Res, Lima - Peru

^[3] Natl Inst Alternat Technol Detect, Toxicol Evaluat & Removal Micropollutants & Radio, Araraquara, SP - Brazil

^[4] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, Sao Paulo, SP - Brazil

^[5] Univ Porto, Fac Ciencias, REQUIMTE LAQV, Porto - Portugal

^[6] Univ Autonoma Barcelona, Barcelona - Spain

• Document type: Journal article
• Source: Talanta; v. 181, p. 19-23, MAY 1 2018.
• Web of Science Citations: 7

Abstract

The determination of 1-chloro-2,4-dinitrobenzene (CDNB) was used as a proof-of-concept to a simple analytical practical configuration applying magnetic molecularly imprinted particles (mag-MIPs). Mag-MIPs were captured from an emulsion by a home-made magneto-sensor (where a small magnet was entrapped by a graphite-epoxy composite) and then, this sensor, was transferred to the solution containing the analyte, where, after binding to the mag-MIPs, the analyte was directly analysed using differential pulse voltammetry (DPV) since the magneto sensor acted as the working electrode. After optimization, a detection limit of 6.0 mu mol L-1 with a RSD of 2.7% was achieved along with suitable recoveries and selectivity. This methodology offers a different approach for electroanalytical methodologies using mag-MIPs. (AU)

• FAPESP's process: 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies
• Grantee: Maria Valnice Boldrin
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 16/06926-0 - Development and application of new nanostructured chemical sensors and applications of new nanostructured chemical sensors based on biomimetic polymers
• Grantee: Maria Del Pilar Taboada Sotomayor
• Support Opportunities: Research Grants - Visiting Researcher Grant - International
• FAPESP's process: 14/25264-3 - Development and application of new nanoestructurated chemical sensors based on biomimetic polymers
• Grantee: Maria Del Pilar Taboada Sotomayor
• Support Opportunities: Regular Research Grants