[Application of extraction needle using selective and enhanced polymer in the analysis of samples containing...

Low concentrations of gas components usually need to be condensed before analyzing them by gas chromatography (GC). Extraction Needle using Selective and Enhanced Polymer (EN-SEP) is a recently developed devise for condensing the components that are difficult to detect by using GC. EN-SEP consists of a needle which contains methacrylate co-polymer. Gas components are adsorbed and condensed on the polymer by passing through the needle. This paper describes the usefulness of EN-SEP in a criminal case. EN-SEP was successfully applied to condense and detect a trace of propylene glycol monomethyl ether contained in a soft drink by using gas chromatography/mass spectrometry.