RT info:eu-repo/semantics/article
T1 Electrochemical SERS and SOERS in a single experiment: A new methodology for quantitative analysis
A1 Hernández Muñoz, Sheila
A1 Perales Rondon, Juan Víctor
A1 Heras Vidaurre, Aránzazu
A1 Colina Santamaría, Álvaro
K1 EC-SERS
K1 EC-SOERS
K1 Raman spectroelectrochemistry
K1 Nicotinic acid
K1 Nicotinamide
K1 Química analítica
K1 Chemistry, Analytic
AB In the present work, a new methodology which combines two different phenomena to enhance the Raman signal is used to resolve a mixture of two compounds with similar molecular structures. The use of Raman spectroelectrochemistry (Raman-SEC) allows us to collect simultaneously, with high time-resolution, the enhancement of the Raman signal of the compounds present in a sample during the electrochemical oxidation-reduction cycle (ORC) of a silver screen-printed electrode. During such ORC two different phenomena appears depending on the stage of the electrochemical modification of the silver substrate, which are known as electrochemical surface enhanced Raman scattering (EC-SERS) and electrochemical surface oxidation enhanced Raman scattering (EC-SOERS). This work is a proof of concept that demonstrates the advantage of using EC-SOERS and EC-SERS in a single experiment to resolve mixtures of similar molecules such as vitamin B3, which components are nicotinic acid and nicotinamide. Although the interaction between analytes and substrates influence a univariate calibration, the trilinear character of Raman-SEC makes possible to deconvolve such interactions and provide a good calibration curve for both, nicotinic acid and nicotinamide.
PB Elsevier
SN 0013-4686
YR 2020
FD 2020-02
LK http://hdl.handle.net/10259/5337
UL http://hdl.handle.net/10259/5337
LA eng
NO Ministerio de Economía y Competitividad (Grants CTQ2017-83935-R-AEI/FEDERUE), Junta de Castilla y León (Grant BU033-U16 and BU297P18) and Ministerio de Ciencia, Innovación y Universidades (RED2018-102412-T). J.V.P-R. thanks JCyL for his postdoctoral fellowship (Grant BU033-U16)
DS Repositorio Institucional de la Universidad de Burgos
RD 23-nov-2024