The Gas Chromatography/Mass Spectrometry (GC/MS) instrument separate compounds of chemical mixtures in the GC part and analyze each compound emerge from the column in the mass part. Identification is based on the pattern provided by separation of ionic fragments of the component according to mass-to-charge ratios (m/z) in an electric or magnetic field and compares this mass spectrum with known entries in a mass spectrum library to find target. The method is one of the most accurate tools for quantitative and qualitative analyzing of samples and has a variety of applications in different fields. e.g.: environmental analysis of volatile organic compounds (VOCs) and pesticides, explosives investigation, hydrocarbon mixtures analyzing, fire investigation, criminal forensics, drug detection and anti-doping analysis in sports, Food, beverage and perfume analysis, identification of unknown samples and so on.
Gas chromatography/tandem mass spectrometry (GC-MS/MS)
The GC-MS/MS is using a second phase of mass fragmentation which provides the opportunity of obtaining more detailed information about unknown samples and enables to analyze more complex compounds faster than a GC, MS, or GC/MS.
The GC-MS/MS is also suitable for quantitating low levels of a compound in front of a high matrix background.