Molecular Imprinted Polymer - Template Removal - Solvent Extraction

Solvent Extraction

  • Soxhlet Extraction This has been a standard extraction method with organic solvents since its creation over a century ago. This technique consists of placing the MIP particles into a cartridge inside the extraction chamber, and the extraction solvent in poured into a flask connected to the extractor chamber. The solvent is then heated and condenses inside the cartridge thereby contacting the MIP particles and extracting the template. The main advantages to this technique are the repeated washing of MIP particles with fresh extracting solvent, favors solubilization because it uses hot solvent, no filtration is required upon completion to collect the MIP particles, the equipment is affordable, and it is very versatile and can be applied to nearly any polymer matrix. The main disadvantages are the long extraction time, the large amount of organic solvent used, the possibility or degradation for temperature sensitive polymers, the static nature of the technique does not facilitate solvent flow through MIP, and the automation is difficult.
  • Incubation This involves the immersion of the MIPs into solvents that can induce swelling of the polymer network and simultaneously favor the dissociation of the template from the polymer. Generally this method is carried out under mild conditions and the stability of the polymer is not affected. However, much like the Soxhlet extraction technique, this method also is very time consuming.

Read more about this topic:  Molecular Imprinted Polymer, Template Removal

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