Organic impurity profiling of seized 3,4-methylenedioxymethamphetamine (MDMA) tablets aims to link tablets to common production sources. Conventionally, organic impurities are extracted from tablets using a liquid-liquid extraction (LLE) procedure prior to analysis by gas chromatography-mass spectrometry (GC-MS). In this research, the development of an alternative microwave-assisted extraction/...

Solid-phase microextraction (SPME) is a versatile new technique for collecting headspace volatiles prior to GC analysis. The commercial availability of uniform SPME fibers makes routine, practical quantitation of headspace concentrations possible, but straightforward information for relating GC peak areas from SPME analyses to headspace concentrations has not been available. The calibration fac...

POWDERED SAMPLES BY HE-SPME-GC/MS Catarina Petisca, Adriana Farah, Olívia Pinho, and IMPLVO Ferreira REQUIMTE – Department of Bromatology, Faculty of Pharmacy, University of Porto R. Aníbal Cunha, 164, 4050-047 Porto, Portugal Laboratory of Food and Nutritional Biochemistry, Department of Biochemistry – Chemistry Institute, Federal University of Rio de Janeiro, RJ, Brazil Faculty of Nutrition a...

A method is described here for the concentration and determination of geosmin 2-methylisoborneol (2-MIB) from gaseous phase, with translation to field collection quantification soil disturbances in situ. The based on use solid-phase microextraction (SPME) fibers adsorption volatile chemicals vapor followed by desorption into a gas chromatograph-mass spectrometer (GC-MS) analysis. SPME fiber all...