Membranes of Nata de coco-nanoparticles Fe3O4 For Diazinon Sensors

Development of diazinon sensors using mixed membranes of nata de coco and Fe 3 O 4 nanoparticles on the SPCE (screen printed carbon electrode) surface has been carried out potentiometrically. The design of the sensor begins with the optimization of Fe 3 O 4 nanoparticles added to the membranes of 50%, 67% and 75% while pH optimization using pH 4-5 acetate buffer and phosphate buffer pH 6-7. 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 67% Fe 3 O 4 nanoparticles and pH 5. The Nernst factor was 34.5 mV / decade, the detection limit value of 1,3 x 10 -9 mol.L -1 in the range concentration of 10 -11 - 5x10 -8 molL -1 with a response time of 140 seconds.