Selective solid-phase extraction of naproxen drug from human urine samples using molecularly imprinted polymer-coated magnetic multi-walled carbon nanotubes prior to its spectrofluorometric determination

The Analyst ◽  
2013 ◽  
Vol 138 (16) ◽  
pp. 4542 ◽  
Author(s):  
Tayyebeh Madrakian ◽  
Mazaher Ahmadi ◽  
Abbas Afkhami ◽  
Mohammad Soleimani
Keyword(s):  
Carbon Nanotubes ◽  
Solid Phase Extraction ◽  
Molecularly Imprinted Polymer ◽  
Solid Phase ◽  
Phase Extraction ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Spectrofluorometric Determination ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Solid phase extraction of doxorubicin using molecularly imprinted polymer coated magnetite nanospheres prior to its spectrofluorometric determination

2015 ◽  
Vol 39 (1) ◽  
pp. 163-171 ◽  
Author(s):  
Mazaher Ahmadi ◽  
Tayyebeh Madrakian ◽  
Abbas Afkhami
Keyword(s):  
Solid Phase Extraction ◽  
Molecularly Imprinted Polymer ◽  
Solid Phase ◽  
Phase Extraction ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Spectrofluorometric Determination

Selective doxorubicin-imprinted polymer coated magnetite nanospheres were synthesized.

scholarly journals Solid-phase extraction cartridges with multi-walled carbon nanotubes and effect of the oxygen functionalities on the recovery efficiency of organic micropollutants

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Marta O. Barbosa ◽  
Rui S. Ribeiro ◽  
Ana R. L. Ribeiro ◽  
M. Fernando R. Pereira ◽  
Adrián M. T. Silva
Keyword(s):  
Carbon Nanotubes ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Surface Groups ◽  
Phase Extraction ◽  
Organic Micropollutants ◽  
Oxidation Method ◽  
Hydrothermal Oxidation ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

AbstractPristine and functionalized multi-walled carbon nanotubes (MWCNTs) were investigated as adsorbent materials inside solid-phase extraction (SPE) cartridges for extraction and preconcentration of 8 EU-relevant organic micropollutants (with different pKa and polarity) before chromatographic analysis of surface water. The recoveries obtained were > 60% for 5/8 target pollutants (acetamiprid, atrazine, carbamazepine, diclofenac, and isoproturon) using a low amount of this reusable adsorbent (50 mg) and an eco-friendly solvent (ethanol) for both conditioning and elution steps. The introduction of oxygenated surface groups in the carbon nanotubes by using a controlled HNO3 hydrothermal oxidation method, considerably improved the recoveries obtained for PFOS (perfluorooctanesulfonic acid) and methiocarb, which was ascribed to the hydrogen bond adsorption mechanism, but decreased those observed for the pesticide acetamiprid and for two pharmaceuticals (carbamazepine and diclofenac), suggesting π–π dispersive interactions. Moreover, a good correlation was found between the recovery obtained for methiocarb and the amount of oxygenated surface groups on functionalized MWCNTs, which was mainly attributed to the increase of phenols and carbonyl and quinone groups. Thus, the HNO3 hydrothermal oxidation method can be used to finely tune the surface chemistry (and texture) of MWCNTs according to the specific micropollutants to be extracted and quantified in real water samples.

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