Open AccessThe Use of Nanocomposite Au / Fe2H2O4 –GO Based on Surface Plasmon Resonance to Detect Toxic Arsenic(V) in Aqueous Solution
Author(s) -
Sura H. Al – Rekabi,
Ali Al Wahib,
Mohaiman J. Sharba
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/518/5/052006
Subject(s) - detection limit , surface plasmon resonance , arsenic , aqueous solution , graphene , materials science , analytical chemistry (journal) , metal ions in aqueous solution , nanocomposite , prism , resonance (particle physics) , nanotechnology , nanoparticle , chemistry , metal , optics , chromatography , metallurgy , physics , particle physics
In this study, the Au / Fe 2 H 2 O 4 -GO films are shown to improve the optical sensors based on the plasmon resonance technique, through the modification of the sensor chip with gold film (48.3nm) for the detection of toxic heavy metal Arsenic (V) in solution, the concentrations of ions in the parts per billion range. Mat lab software employing Fresnel formula for a layer system was used in data analysis. The sensor ranged linearly from 1 to 10 ppb. The SPR curves for the Au / Fe2H2O4-GO with different percentages of graphene oxide GO to Fe 2 H 2 O 4 (1:10 % (v/v)) respectively were attached separately the prism. The results show that when the films with 3% GO which can be observed as the optimum percentage enhancement of sensitivity for detecting ions from 0.0773°ppb −1 for Au/Fe 2 H 2 O 4 to 0.2509° ppb −1 for Au / Fe2H2O4-GO. With a limit of detection 0.6 μg/L fulfills the detection requirement below the 10 and 5μg/L contaminant levels of Arsenic as suggested by World Health Organization (WHO) and Environmental Protection Agency (EPA). The analytical method was verified by linearity, detection limits, precision, accuracy, and recovery experiments, achieved acceptable results in all states.