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Reference type: Journal
Authors: de Faria HD, Abrão LC, Santos MG, Barbosa AF, Figueiredo EC
Article Title: New advances in restricted access materials for sample preparation: A review.
Publication date: 2017
Journal: Analytica Chimica Acta
Volume: 959
Page numbers: 43-65.
DOI: 10.1016/j.aca.2016.12.047
Alternative URL: http://www.sciencedirect.com/science/article/pii/S000326701730020X

Abstract: The determination of organic and inorganic analytes from biological samples need efficient sample preparation procedures in order to capture the analyte in a media with many macromolecules, which can cause analytical errors and problems with the instruments. Thus, "intelligent" sorbents, called restricted access materials (RAMs), have been widely used with these samples, due to their ability to retain analytes and exclude macromolecules. These materials have been obtained by modifying the external surfaces of conventional sorbents (e.g. polymers, carbon nanotubes, active carbon, and silica-based materials) with hydrophilic groups (chemical barrier), as well as by the presence of small pores (physical barrier) accessible only to low molecular weight molecules. Supramolecular solvents (SUPRAs) have also been used as RAMs, due to their abilities to exclude proteins according to size or through precipitation with the solvents. Therefore, due to the relevance of these materials, this review presents an overview of the most recent advances in obtaining RAMs based on silica, polymers, carbon nanotubes, (activated) carbon, and solvents, as well as their applications in biological sample preparation
Template and target information: Review - restricted access materials in sample preparation
Author keywords: Restricted access materials, Restricted access molecularly imprinted polymers, Restricted access carbon nanotubes, Restricted access-activated carbon cloths, Supramolecular solvents, sample preparation, Protein exclusion

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