An Optical Chemical Sensor For Monitoring Of Nickel In Waters And Hydrogen Peroxide Samples

Abstract

Application of nickel in different industries has been developed and so contamination of natural water is a great concern due to its potentially toxic effects on living beings. Therefore, fast monitoring of Ni2+in aqueous samples is important. In this work, we fabricated a sensitive optical sensor for determination of nickel in mineral water samples and hydrogen peroxide solutions. The optodewas prepared by incorporation of 1-(2-pyridylazo)-2-naphthol and sodium tetraphenylborate in a plasticized poly (vinyl chloride) membranes containing dioctyladipate as a plasticizer.The influence of several parameters such as pH, base matrix, solvent mediator and ligand concentration were optimized. Comparison the obtained results with previously reported sensors revealed that the proposed method, in addition to fast and simplicity, provided good linear range (1.70–85.20 μmol L-1) and low detection limit (0.17 μmol L-1). The precision (relative standard deviation) was better than 1.55%for 7 replicate determinations of 17.10 μmol L-1of Ni in various membranes.