Gas Chromatography / Mass Spectrometry (GS/MS)
GC/MS is a separation technique that is used routinely in forensic laboratories for the examination of drugs, fire debris, toxicology and trace evidence. In the examination of writing inks GC/MS is used to quantitate various components that are present in ink that decrease with time and therefore can be used as an indication of the age of the writing. GC/MS requires the removal of samples of ink from the documents at issue in order to complete the examination.
Specifications:
- Agilent Model 6890 GC and Model 5975B MSD
- Column – HP5MS, 30’
- Helium gas flow at 1ml/min
- Source - 250ºC
- Injector - 250ºC
- Oven - 75ºC ramped at 25º/min. to 250ºC
