Porous Materials Fabrication And Application For Rapid Solid Phase Microextraction-Surface Enhanced Raman Spectrum Detection

With the development of technology and economy,the frequent occurrence of environmental pollution and food safety incidents has attracted extensive attention.Therefore,it is important to develop the rapid in-situ detection technology for real-time monitoring.Traditional detection technology usually needs complex sample pretreatment process such as filtration and purification because of the complex in actual samples.Solid-Phase Micro-extraction(SPME)is an efficient pretreatment technique based on adsorption and desorption equilibrium between extraction coatings and samples,has been coupled with warious detection techniques.Surface Enhanced Raman Spectroscopy(SERS)is a highly characteristic label-free vibration spectroscopy and a powerful on-site detection technology.SPME-SERS is an effective tool for on-site monitoring,which can integrate extraction,enrichment and detection into one step to significantly decrease the time,labor,and expenses.In this paper,two new detection methods for solid phase microextraction couple with surface enhancement were developed for rapid in situ detection of samples1.A hyphenated method of electricity-driven solid phase microextraction-surface enhanced Raman spectroscopy was proposed.Au@porous silver(Au@p-Ag)fiber was synthesized by electrochemical method.Nano particles of noble metal can provide surface enhanced Raman signal.The substrate Au@p-Ag fiber was used to enrich and detect charged antibiotics within 1 min.2.A 3D structure Au@ZnO extraction abstracte membrane was generated by seeding method and sputter on aluminum foil,which has good uniform stability and SERS enhanced capability.By fixing the substrate on the surface of commercial magnetic stirring,in-situ stirring microextraction and surface enhancement can be realized.By this method,rapid enrichment and detection of malachite green in aqueous solution can be completed within five minutes.