Abstract
A conductometric sensor based on screen-printed interdigital gold electrodes on glass substrate coated with molecularly imprinted polyurethane layers was fabricated to detect polycyclic aromatic hydrocarbons (PAHs) in water. The results prove that screen-printed interdigital electrodes are very suitable transducers to fabricate low-cost sensor systems for measuring change in resistance of PAH-imprinted layers while exposing to different PAHs. The sensor showed good selectivity to its templated molecules and high sensitivity with a detection limit of 1.3 nmol/L e.g., for anthracene in water which is lower than WHO’s permissible limit.
Highlights
There is a huge demand for environmental monitoring technologies due to increasing environmental pollutants and their adverse health effects
The stability of molecular imprinted polymers (MIP) layer was tested over a period of two months by repeating measurements of its resistance to 2 μg/L anthracene in electrolyte solution
polycyclic aromatic hydrocarbons (PAHs) imprinted polyurethane coated conductometric sensors based on screen-printed interdigitated electrode were developed
Summary
There is a huge demand for environmental monitoring technologies due to increasing environmental pollutants and their adverse health effects. PAHs are a group of persistent organic pollutants and bioaccumulatives [1]. Trace analytical methods for complex matrices rely on efficient sample enrichment and selective assays. These methods are very sensitive but ill-suited for on-site monitoring of pollutants due to their limitations. Imprinted layers of modified non-porous or porous particles, films, or other materials can be used to detect various. Of modified non-porousimprinting or porous can particles, films, or other for small molecules with no functionality such as PAHs. The imprinting effect depends preferably on materials can be used to detect various analytes. MIP based conductometric sensor has been developed for anthracene with a der Waals forces between template and self-organizing polymers. Detection limit of 1.3 nmol/L which is lower than WHO’s permissible limit of PAHs (3.93 nmol/L) [25]
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