Carbon Nanotubes Used as SPME Medium for Aniline Compounds

Scientists from Lanzhou University (Lanzhou, China) developed an automated on-line method for determining substituted aniline compounds that consisted of in-tube solid-phase microextraction (SPME) with oxidized multiwalled carbon nanotubes coated on the outside surface of the SPME fiber, which was inserted into PEEK tubing attached to a six-port injection valve.

Scientists from Lanzhou University (Lanzhou, China) developed an automated on-line method for determining substituted aniline compounds that consisted of in-tube solid-phase microextraction (SPME) with oxidized multiwalled carbon nanotubes coated on the outside surface of the SPME fiber, which was inserted into PEEK tubing attached to a six-port injection valve. The extraction step was followed by high performance liquid chromatography (HPLC). In the extraction procedure, a constant flow pump drove the sample solution through the PEEK tubing and the nanotubes adsorbed the analytes. The valve then was switched to allow analyte desorption and injection into the HPLC system.