a sensitive electroanalytical sensor amplified with pd-zno nanoparticle for determination of sunset yellow in real samples

In the present study, zno nanoparticle doped with pd (zno-pd) using one simple chemical precipitation method has been synthesized and characterized by different characterization methods. the synthesized nanoparticle presented a nano-size spherical shape with d<50 nm. in continuous, zno-pd as a conductive mediator has been used for modification of paste electrode (pe) in the presence of 1-butyl-3-methylimidazolium hexafluoro phosphate, ([c4mim]-[pf6]) and paraffin oil as the binder. the zno-pd/[c4mim]-[pf6]/pe was used as an electroanalytical sensor for the determination of sunset yellow (sy) and obtained results proved a distinct improvement in oxidation signal about 2.57 times compared to an unmodified electrode. on the other hand, the zno-pd/[c4mim]-[pf6]/pe showed a good ability for the determination of sy in concentration range 0.001-280 μm with detection limit 0.4 nm. in addition, the ability of zno-pd/[c4mim]-[pf6]/pe for the determination of sy was checked in various food samples and recovery data between 97.84-104.73% confirm the powerful ability of proposed sensor for determination of sy in food samples.