Abstract: Organophosphorus compounds (OPs) as important components of insecticides, pesticides, and chemical threat agents (CTA), have become more and more serious threats to the environment. Real-time monitoring of the threats is an urgent demand for environmental safety. The molecular imprinting polymer (MIP) technique is an attractive method for the generation of polymer-based molecular "memory" for a present target or group of target molecules. In this work, we integrate a novel MIP with quartz crystal microbalance (QCM) to build a simple sensor to selectively monitor OP in water samples in real-time. The MIP system was built up by polymerization of methacryalic acid (MAA) with divinylbenzene (DVB), initiated with 2,2'-azobis(2-methylpropionitrile) (AIBN) in presence of target. The polymer was characterized with FT-IR. Using parathion as a representative template, the MIP was coated on QCM by casting a semi-polymerized solution. The sensor could detect parathion in wide range from 290 ppb to 29 ppm. This sensor is stable, easy to prepare which can be reused and has the potential to be applied other analytes, which are threats to the environment.
Template and target information: parathion, organophosphorus compounds, OPs
Author keywords: organophosphorus compounds, molecular imprinting polymer, quartz crystal microbalance, Parathion