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Influence of the electrografting method on the performances of a flow electrochemical sensor using modified electrodes for trace analysis of copper (II)
- Source :
- Journal of electroanalytical chemistry and interfacial electrochemistry, Journal of electroanalytical chemistry and interfacial electrochemistry, 2015, 744, pp.1--7. ⟨10.1016/j.jelechem.2015.02.032⟩, Journal of electroanalytical chemistry and interfacial electrochemistry, Elsevier, 2015, 744, pp.1--7. ⟨10.1016/j.jelechem.2015.02.032⟩
- Publication Year :
- 2015
- Publisher :
- HAL CCSD, 2015.
-
Abstract
- The performances of carboxylate- and cyclam-modified graphite felt electrodes prepared by different electrografting methods for trace analysis of copper (II) were compared to determine the influence of the immobilization process of the linkers on the sensor properties. The derivatization performed by cathodic reduction of diazonium salts and by anodic oxidation of amines in organic and aqueous media was first evaluated by cyclic voltammetry and X-ray photoelectron spectroscopy analyses, showing a higher surface coverage for the reduction process. Cyclam was subsequently attached on the COOH-modified graphite felts by a coupling reaction. The modified electrodes were then employed in a flow analytical system for trace analysis of copper (II) ions. The influence of the surface coverage and the nature of the linker on the electrochemical signal obtained by linear sweep stripping voltammetry analysis after a preconcentration step performed at open circuit was highlighted. The selectivity estimated in the presence of lead used as a common ion interferent was higher when a selective receptor was used and depends on the nature of the linker.
- Subjects :
- Copper detection
[CHIM.ORGA]Chemical Sciences/Organic chemistry
General Chemical Engineering
Electrografting
Inorganic chemistry
Open circuit preconcentration
chemistry.chemical_element
Electrochemistry
Copper
Analytical Chemistry
Electrochemical gas sensor
chemistry.chemical_compound
chemistry
Electrode
Cyclam
Graphite
Cyclic voltammetry
Voltammetry
Sensor
Subjects
Details
- Language :
- English
- ISSN :
- 00220728
- Database :
- OpenAIRE
- Journal :
- Journal of electroanalytical chemistry and interfacial electrochemistry, Journal of electroanalytical chemistry and interfacial electrochemistry, 2015, 744, pp.1--7. ⟨10.1016/j.jelechem.2015.02.032⟩, Journal of electroanalytical chemistry and interfacial electrochemistry, Elsevier, 2015, 744, pp.1--7. ⟨10.1016/j.jelechem.2015.02.032⟩
- Accession number :
- edsair.doi.dedup.....66beb8381fd311f50e544534347c9c08