Membranes of Nata de coco-nanoparticles Fe3O4 For Diazinon Sensors

Abstract

Development of diazinon sensors using mixed membranes of nata de coco and Fe3O4 nanoparticles on the SPCE (screen printed carbon electrode) surface has been carried out potentiometrically. The sensor design was conducted by optimization of Fe3O4 nanoparticles added to the membrane by comparison of 50%, 67% and 75% (Fe3O4 nanoparticles in the Nata de Coco) while pH optimization was performed at pH 4-5 using acetate buffer and pH 6-7 using phosphate buffer. The diazinon sensor of the result has been tested at range concentration of 10-12 - 10-5 mol.L-1. The results showed that the best sensor performance was used at a ratio of 67% Fe3O4 nanoparticles and at pH 5. The Nernst factor was 34.5 mV/decade, in the range concentration of 10-11 - 5x10-8 molL-1 with a response time of 140 seconds.