Journal Pre-proof Electrochemical determination of insulin at CuNPs/chitosan- MWCNTs and CoNPs/chitosan-MWCNTs modified screen printed carbon electrodes Ivana Šišoláková, Jana Hovancová, Renáta Oriňaková, Andrej Oriňak, Libuše Trnková, Iveta Třísková, Zdeněk Farka, Matěj Pastucha, Jozef Radoňák PII: S1572-6657(20)30064-3 DOI: https://doi.org/10.1016/j.jelechem.2020.113881 Reference: JEAC 113881 To appear in: Journal of Electroanalytical Chemistry Received date: 5 December 2019 Revised date: 20 January 2020 Accepted date: 21 January 2020 Please cite this article as: I. Šišoláková, J. Hovancová, R. Oriňaková, et al., Electrochemical determination of insulin at CuNPs/chitosan-MWCNTs and CoNPs/ chitosan-MWCNTs modified screen printed carbon electrodes, Journal of Electroanalytical Chemistry(2020), https://doi.org/10.1016/j.jelechem.2020.113881 This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. © 2020 Published by Elsevier.