Carbon nanotubes as SPE sorbents for the extraction of salicylic acid from river water.

This paper deals with the ability of different types of carbon nanotubes to adsorb salicylic acid in river water samples. The use of these nanoparticles as a sorbent in a SPE procedure prior to CE analysis is essential for improving the enrichment factor and the recovery values. Several experimental variables were optimized in order to maximize the extraction efficiency.

Microextraction by packed sorbents combined with surface-enhanced Raman spectroscopy for determination of musk ketone in river water.

Microextraction by packed sorbents (MEPS) combined with Surface-enhanced Raman spectroscopy (SERS) was investigated, and applied to the determination of musk ketone (MK) in river water samples. The full MEPS-SERS method includes analyte enrichment by MEPS preconcentration with C18 sorbent followed by SERS detection supported by silver nanoparticles. An eluent drop containing the analyte is deposited directly from the MEPS syringe on a CaF2 glass plate.

Liquid-liquid extraction assisted by a carbon nanoparticles interface. Electrophoretic determination of atrazine in environmental samples.

A novel method for the determination of atrazine, using liquid-liquid extraction assisted by a nanoparticles film formed in situ and composed of organic solvent stabilized-carbon nanoparticles, is described. The presence of nanoparticles located at the liquid-liquid interface reinforced the extraction of analyte from matrix prior to capillary electrophoresis (CE) analysis. Some influential experimental variables were optimized in order to enhance the extraction efficiency.

Multiplexed sensing and imaging with colloidal nano- and microparticles.

Sensing and imaging with fluorescent, plasmonic, and magnetic colloidal nano- and microparticles have improved during the past decade. In this review, we describe the concepts and applications of how these techniques can be used in the multiplexed mode, that is, sensing of several analytes in parallel or imaging of several labels in parallel.