Polysulfone and MIPs coated over nickel foam

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Microextraction is currently present in many analytical processes. Its advantages over conventional extraction approaches have been extensively pointed out and mainly refer to its simplicity and miniaturization while providing equal or even better analytical features. Also, the availability of the sorbents (carbon-based, silica, metallic, magnetic...), formats (fiber, capillary, powder, particles and membranes) and combinations among them make possible the processing of any sample-analyte binomial. A step forward in the development of novel sorbents phases is selectivity. Highly selective extractant allows to face the determination of the analytes in complex matrices such as biological fluids or food.

Nickel foam
The group of Prof. Zhang has proposed the synthesis and evaluation of molecularly imprinted polymers (MIPs) that allows the selective extraction of floxacin from water and biological samples. We are all aware about the ability of such polymeric phases to selective recognize and isolate target analyte in a complex environment. Also, the outstanding performance of nanoMIPs versus MIP has been extensively reported. The research presented in this contribution makes use of a nickel foam as support for the MIP layer which is stocked by means of polysulfone. The main advantage of the proposed selective microsorbent is that the thickness of the flat microextraction unit can be easily controlled modifying the concentration of polysulfone and the amount of MIP. The dimension of the nickel foam used as support is 1.5X1.5 cm. The coating of polysulfone and MIPs is deposited by the sequential dipping of the nickel foam in the proper solutions and it takes less than 3 min to be completed. It should be noted that the polysulfone improves the analyte interaction which results in an increased adsorption and thus a better sensitivity.

You can go through the research article to learn more about the synthesis and evaluation of the described microextraction device and discover its potential applicability in different analytical fields. Enjoy!

Reference

(1) Preparation of polysulfone materials on nickel foam for solid-phase microextraction of floxacin in water and biological samples. Link to the article

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