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The establishment of EVISA is funded by the EU through the Fifth Framework Programme (G7RT- CT- 2002- 05112).

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gas-chromatography mass spectrometry

GC-MS is a hyphenated technique in which a gas-chromatograph is coupled to a mass spectrometer.
GC-MS can be combined with any ionization method suitable to ionize neutral molecules in the gas phase but in  practice electron ionization (EI) and chemical ionization (CI) in both positive and negative ion modes are the methods of choice.


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