The C-strip is subsequently removed from the container and placed in carbon disulfide. The identification of hydrocarbon constituents is performed by comparison to known standards. Volatile molecules in the headspace of a sample sorb to a silica fiber coated with a polymeric stationary phase. A gas chromatogram of a charcoal lighter fluid standard obtained by SPME is shown below. Click here for sample homework problem 4 5.
Typical fluids are blood, semen, and saliva.
Due to the discrimination power of DNA technology, several basic serology tests have been discontinued in the past decade. However, it is still imperative to identify the origin of a body fluid before results from its analysis are presented in court. Forensic DNA analysis deals with the identification of the source of a body fluid through DNA testing. Since its inception more than a decade ago, it was anticipated that forensic scientists would be able to identify the source of biological evidence with the same certainty that traditional fingerprint evidence has always been presented in court. Students learned the advantages and sample requirements for each technique.