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Evaluation of multi-walled carbon nanotubes for miniaturized extraction of drugs and their degradation products present in water

Grant number: 13/06233-7
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): July 01, 2013
Effective date (End): January 31, 2014
Field of knowledge:Physical Sciences and Mathematics - Chemistry
Principal Investigator:Alvaro José dos Santos Neto
Grantee:Daiane Cristina Marqui
Home Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil


Carbon nanotubes are classified as single-walled and multi-walled carbon nanotubes, according to the quantity of graphene sheets. Studies show that carbon nanotubes exhibit great surface area which makes them good sorbents, with high adsorption capacity. Once carbon nanotubes are non porous sorbent, desorption occurs quickly. Due to these characteristics, carbon nanotubes have been demonstrating a high potential to be used as sorbent in microdevices. Miniature liquid chromatography uses capillary columns that have inner diameter smaller than conventional columns, reducing solvent and sample consumption, in addition to improving its performance. Here we intend to evaluate the efficiency of multi-walled carbon nanotubes as sorbent for the extraction of drugs and their degradation products present in water using microextraction by packed syringe as well as online column switching capillary liquid chromatography. (AU)