Multiamperometric-SERS detection of melamine on gold screen-printed electrodes

Sheila Hernandez, Lydia Garcia, Martin Perez-Estebanez, William Cheuquepan, Aranzazu Heras, Alvaro Colina

Research output: Contribution to journalArticlepeer-review

Abstract

A new, simple and fast protocol to generate gold-based SERS substrates is presented in this work. Melamine is a compound widely used in the industry that can be toxic for humans if consumed even in low concentrations. EC-SERS is an excellent alternative to classical methods to detect and quantify this compound because Raman spectroscopy provides a fingerprint of the molecules, providing very good sensitivity. In this work, time-resolved Raman spectroelectrochemistry is employed to generate a SERS substrate and to detect melamine, all in a single experiment. The dynamic character of this technique provides valuable information about the interaction of the molecule with the generated substrate. An optimization of the spectroelectrochemical method based on a multi-pulse amperometric detection has been performed. The new protocol presented in this work shows significant figures of merit in a very short experiment time, just 25 s.

Original languageEnglish
Article number116478
JournalJournal of Electroanalytical Chemistry
Volume918
DOIs
Publication statusPublished - 1 Aug 2022
Externally publishedYes

Keywords

  • EC-SERS
  • Gold-electrodes
  • Melamine
  • Raman
  • Time-resolved spectroelectrochemistry

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