Determination of polycyclic aromatic hydrocarbons in marine sediments by high-performance liquid chromatography after microwave-assisted extraction with micellar media.
A simple and rapid method is developed for extraction and determination of polycyclic aromatic hydrocarbons (PAHs) in marine sediments. The procedure was based on the microwave-assisted extraction of PAHs in marine sediment samples using a micellar medium of Polyoxyethylene 10 lauryl ether as extractant. Two-level factorial designs have been used to optimize the microwave extraction process. The analysis of extracts has been carried out by HPLC with UV detection. Fortified sediments gave an average recovery between 85.70 and 100.73%, with a relative standard deviation of 1.77-7.0% for PAHs with a ring number higher than three.
Microwave-Assisted Extraction of Organic Compounds from Standard Reference Soils and Sediments
As part of an ongoing evaluation of new sample preparation techniques by the U.S. Environmental Protection Agency (EPA), especially those that minimize waste solvents, microwave-assisted extraction (MAE) of organic compounds from solid materials (or «matrices») was evaluated. Six certified reference materials containing polynuclear aromatic hydrocarbons (PAHs) and a few base/neutral/acidic compounds, all of which are common pollutants of interest to the EPA, were subjected to MAE in a closed-vessel microwave system with hexane/acetone (1:1) at different temperatures (80, 115, and 145 o C) and for different periods of time (5, 10, and 20 min)
Alicyclic Analogue of Mescaline
WE wish to describe the preliminary pharmacology of a mescaline analogue, 2-(3,4,5-trimethoxyphenyl)-cyclopropylamine (TMT, II). This compound was selected for synthesis as a potential long-acting psychotomimetic which would be useful for studying the mode of action of mescaline-like compounds.