Reduced solvent solid phase extraction

Details Reduced solvent solid phase extraction Reduced solvent solid phase extraction

1994-09-15

1996-10-15

Williams, Hezron E.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Content or effect of a constituent of a liquid mixture

G01N 1300

Patent

active

055656226

ABSTRACT:
A simplified method for solid phase extraction of components of interest from a sample employing a syringe in which the inner surface of the cannula or needle is at least partially coated with a stationary phase such that aspirating the sample into the needle results in adsorption of the components of interest into the stationary phase. Aspiration of a solvent may be employed for removing the components of interest from the stationary phase for direct injection into a chromatographic instrument, or the components of interest may be removed by thermal desorption, wherein the needle is placed in the injection port of the chromatographic instrument and heated.

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