Modified Carbon Paste Electrode Based on Graphen oxide nano particles and Ionic Liquid for Potentiometric Determination of Na1+ Ions in Real Samples

in this article to determination negligible amounts of sodium was made a selective and sensitive carbon paste sensor modified with (1- Hexyl 3methyl imidazolium hexafluoro phosphate and graphene oxide nanoparticle.).in several reviews has been reported applied ionic liquids in carbon paste electrode composition (1-4). CPEs are extensively applied for coulometry, amperometry and potentiometry analysis because of considerable beneficial properties (5). the proposed electrode demonstrates admissible selectivity and low detection limit using the ionopher. for better respond to this sensor was utilized graphen.in order to more accurate response and optimization and the effect of independent variables are utilized from center composite design -method of the base of surface response method (RSM)in the help of soft designer expert. also, were investigated the effects of 5 significant factors;(graphite powder%, ionopher %, ionic liquid%, paraffin oil%, nanoparticle %) in 5 levels in 21 totally randomized tests. then obtained slop nerenstian 59.899 (mv per decade), linear dynamic range (10-1-10-7) molar and limit of detection 10-7 molar for the optimized electrode with percentage of specified compound. also the electrode displayed excellent sensivity and high selectivity, for sodium compared to wide range of annoying cations low detection limit and desirable repeatability.