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oai:riubu.ubu.es:10259/53372022-04-08T07:52:59Zcom_10259_3844com_10259_5086com_10259_2604col_10259_3845

Hernández Muñoz, Sheila 275 500 Perales Rondon, Juan Víctor 432 500 Heras Vidaurre, Aránzazu 273 500 Colina Santamaría, Álvaro 122 500 2020-06-10T10:27:06Z 2020-06-10T10:27:06Z 2020-02 0013-4686 http://hdl.handle.net/10259/5337 10.1016/j.electacta.2019.135561 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. 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) application/pdf eng Elsevier Electrochimica Acta. 2020, V. 334, 135561 https://doi.org/10.1016/j.electacta.2019.135561 info:eu-repo/grantAgreement/JCyL/BU297P18 info:eu-repo/grantAgreement/MINECO/CTQ2017-83935-R info:eu-repo/grantAgreement/MICINN/RED2018-102412-T Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess EC-SERS EC-SOERS Raman spectroelectrochemistry Nicotinic acid Nicotinamide Química analítica Chemistry, Analytic Electrochemical SERS and SOERS in a single experiment: A new methodology for quantitative analysis info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Electrochimica Acta 334 135561 TEXT Hernandez-ea_2020.pdf.txt Hernandez-ea_2020.pdf.txt Extracted text text/plain 46808 https://riubu.ubu.es/bitstream/10259/5337/5/Hernandez-ea_2020.pdf.txt 97f5534f3cc5377be54b78748c397c83 MD5 5 THUMBNAIL Hernandez-ea_2020.pdf.jpg Hernandez-ea_2020.pdf.jpg IM Thumbnail image/jpeg 4306 https://riubu.ubu.es/bitstream/10259/5337/4/Hernandez-ea_2020.pdf.jpg d958573736a7b18022024fce495520bd MD5 4 LICENSE license.txt license.txt text/plain; charset=utf-8 999 https://riubu.ubu.es/bitstream/10259/5337/3/license.txt b295bcbce42e2caabeb0c623d3860c06 MD5 3 CC-LICENSE license_rdf license_rdf application/rdf+xml; charset=utf-8 805 https://riubu.ubu.es/bitstream/10259/5337/2/license_rdf 4460e5956bc1d1639be9ae6146a50347 MD5 2 ORIGINAL Hernandez-ea_2020.pdf Hernandez-ea_2020.pdf application/pdf 1906033 https://riubu.ubu.es/bitstream/10259/5337/1/Hernandez-ea_2020.pdf eb409b4b6a5aab0d8b34cec4e63ad4b9 MD5 1 10259/5337 oai:riubu.ubu.es:10259/5337 2022-04-08 09:52:59.605 Repositorio Institucional de la Universidad de Burgos bubrep@ubu.es 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