Amperometric/Capacitive Sensor For The Detection Of Organophosphate Pesticides And Its Microminiaturization Exploration

Owing to the high toxicity, extensive use of organophosphate pesticides for pest control results in excessive pesticide residues in food, water as well as environment, posing a highly severe threat on human life. Therefore, rapid determination and reliable quantification of trace level of organophosphate pesticides have become increasingly important.Over the past few years, electrochemical detection, with features that include remarkable sensitivity, low cost, portability, simple pre-treatment, and high compatibility with advanced microminiaturization and micro-fluidization system, offers considerable promise for the pesticides analysis.Based on the above understanding, this article revolves around amperometric/capacitive sensor for the detection of organophosphate pesticides and its microminiaturization exploration:1. We developed an effective flow amperometric inhibition biosensor for the detection of OPs using LDHs as the immobilization matrix of AChE. The resulting flow amperometric biosensor showed high sensitivity, good precision, reproducibility, and stability.2. We devised a new self-assembled selective biosensor for specific organophosphate pesticides based on capacitive detection using (nLDH/CMCD)n inorganic-organic hybrid nanocomposites. The modified electrode showed a capacitance decrease for acephatemet with highly sensitivity and selectivity.3. We devised a new sensitive and selective sensor for the detection of methyl-parathion based on a gold interdigitated microelectrode modified with polypyrrole-Au using a molecular imprinting technique. The modified interdigitated microelectrode showed a capacitance response that is clearly dependent on the concentration of the methyl-parathion with highly sensitivity and selectivity.