Patent ID: 8192692

Claim:
A method for the extraction and desorption of at least one analyte in a liquid phase analyte-bearing sample, said method comprising: providing a gas chromatograph injection port liner sized to be encapsulated within an injection port housing of a gas chromatograph, said injection port housing having a septum at its first end and a column at its second end, said injection port liner sized to fit within said injection port housing and to provide fluid communication between said septum and said column and having length of substantially the entire length of said injection port housing, said gas chromatograph injection port liner having a passageway therethrough, said gas chromatograph injection port liner having an interior surface defining said passageway; coating said interior surface of said gas chromatograph injection port liner with a sorptive coating, said sorptive coating selected to partition said at least one analyte from said liquid phase analyte-bearing sample; injecting said liquid phase analyte-bearing sample into said passageway of said coated gas chromatograph injection port liner; sorptively extracting said at least one analyte from said liquid phase analyte-bearing sample, leaving a liquid phase remaining analyte-bearing sample; removing said liquid phase remaining analyte bearing sample from said coated gas chromatograph injection port liner; installing said gas chromatograph injection port liner entirely within said injection port housing of said gas chromatograph; desorbing said at least one analyte from said coated gas chromatograph injection port liner; and introducing said desorbed at least one analyte into said gas chromatograph.