Abstract
Molecularly imprinted polymer-solid phase extraction (MIP-SPE) adsorbent was prepared for the analysis of selected organophosphorus pesticides(OPPs) in environmental sample. In this work, the influence of process parameters on the preparation of imprinted polymer is presented. In theprocedure of polymerization, molecularly imprinted bulk polymer was prepared using quinalphos and methacrylic acid (MAA) as template molecule and functional monomer, respectively. The influence of the following parameters on recognition properties was investigated namely, types of crosslinker (ethylene glycol dimethacrylate (EGDMA) or divinylbenzene (DVB)) and porogenic solvents (acetonitrile, dichloromethane, toluene, chloroform). Molar ratio of template:functional monomer:cross linker was fixed at 1:4:20. Soxhlet extraction method was conducted to remove the imprint molecule in order to create the recognition sites. A blank/non-imprinted polymer (NIP) was produced simultaneously using identical procedure except in the absence of template molecule.
Highlights
A molecular imprinted polymer (MIP) is a polymer that is formed in the presence of a molecule that is extracted afterwards, leaving complementary cavities behind [1]
Based on UV absorbance, the results showed that the absorption of EDMA on template molecule was much higher than that for DVB cross linker (Figure 3)
The results showed that the Molecularly imprinted polymer-solid phase extraction (MIP-solid-phase extraction (SPE)) is a potential sorbents for selective enrichment, separation, and detection of organophosphorus pesticides (OPPs) from sample matrix
Summary
A molecular imprinted polymer (MIP) is a polymer that is formed in the presence of a molecule that is extracted afterwards, leaving complementary cavities behind [1]. In SPE, the sample is passed through a cartridge or a packed column filled with a solid sorbent where the analytes are absorbed and eluted with an organic solvent. This procedure present several advantages: (i) it is less time consuming than liquid-liquid extraction (LLE) procedure, (ii) it decreases the use of toxic solvents, (iii) the extraction efficiency is not hindered by the formation of emulsions, and (iv) offers the possibility of automation [2,3]. Process parameters influencing the polymerization, the types of cross linker, and porogen solvents were studied to enhance the selectivity of MIP-SPE towards the analyte. A MIP-SPE method based on the imprinted polymer was developed to selectively extract target analytes from sample matrix
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
