Gas chromatography
A mass spectrometer measures the mass to charge ratio of fragmented ions of a sample.  The output of a column can be feed directly into the ionization chamber of the mass spectrometer.  A mass spectrometry detector is capable of being able to obtain information from incompletely separated components.  Two types of mass spectrometer detectors used are quadrupole and time of flight mass analyzers.  In a quadrupole detector, a voltage is produced which makes ions of a specific mass to travel to the detector.  In a time of flight mass analyzer, the speed of an ion is measured allowing the mass to charge ratio to be known.