%0 Journal Article %T Modified potentiometric Sensor for Yb(III) based on Cefixime and Quaternary-doped Graphene %J Analytical and Bioanalytical Electrochemistry %I Analytical and Bioanalytical Electrochemistry is an international scientific journal, which is published online every 3 months (since 2009), every 2 months (since 2011) and monthly (since 2018) by Center of Excellence in Electrochemistry, University of Tehran %Z - %A Pourbasheer, Eslam %A Rashidi, Alimorad %A Sadegh Hasani, Sedigheh %A Rezapour, Morteza %D 2022 %\ 08/31/2022 %V 14 %N 8 %P 806-817 %! Modified potentiometric Sensor for Yb(III) based on Cefixime and Quaternary-doped Graphene %R %X A carbon-based electrode was modified through incorporating N, S, P and B quaternary-doped graphene (NSPBG) in its composition, and given that former studies indicated a selective interaction between cefixime (CEF) and Yb3+ ions in comparison to other lanthanide ions. Therefore, CEF was further incorporated in the CPE composed of a mixed matrix of NSPBG and graphite powder to develop an Yb3+ selective potentiometric carbon paste electrode, and evaluations of the modified CPE reflected that high sensitivity, selectivity; short response time and stability, as well as improved lifetime as opposed to CPEs based on the multiwall carbon nanotube (MWCNTs). The optimized electrode with a composition of 7% NSPBG, 13% CEF, 30% IL and 50 % graphite powder, had a Nernstian response of 19.7±0.1 mV per decade over the concentration range of 1.0×10-7 to 1.0×10-2 M. %U https://www.abechem.com/article_254437_8624cb892c85680e110378b60d965315.pdf