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Enhanced ELSD Sensitivity of Parabens using Sub-Ambient Evaporation
January 5th 2009Varian, Inc. has published an application note entitled Enhanced ELSD Sensitivity of Parabens using Sub-Ambient Evaporation. Parabens are widely used as food additives, in personal care products and pharmaceutical formulations.
The Unique Selectivity of π-Interactions for Solid-Phase Extraction
January 1st 2009Hypercrosslinked polystyrene-type (solid-phase extraction) SPE materials exhibit a unique ability to enter p-interactions with aromatic, heterocyclic and unsaturated compounds. This property permits selective extraction and pre-concentration of the above classes of species from non-polar media and fatty matrices. The principle has been exploited for developing analytical protocols to determine polar furan derivatives in mineral transformer oil, polyaromatic hydrocarbons (PAHs) in smoked fish and for the fractionation of polychlorinated aromatic compounds in environmental matrices.
Current Advances in Microextraction by Packed Sorbent (MEPS) for Bioanalysis Applications
January 1st 2009Microextraction by packed sorbent (MEPS) is a new technique in sample preparation that can be connected on-line to gas chromatography (GC) or liquid chromatography (LC) without any modifications.
