Determination of Solute Descriptors for Illicit Drugs Using Gas Chromatographic Retention Data and Abraham Solvation Model Page: 18
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it destroys everything coming out of the column. The main part of the flame ionization detector
is the ion chamber which is made of stainless steel, including the gas inlet, flame nozzle, a pair
of electrodes and housing. The column flow rate has an impact on the detector's response.
Current is detected when eluent burns and generates ions; there is a change between the jet and
the collector electrode. The current is amplified by the electrometer, producing a response. The
information can be recorder as peak area, retention time and peak height. The retention time is
the time taken for a particular compound to travel through the column to the detector.
Qualitative and Quantitative analysis can be observed through the computer program recorder
[48]High voltage
ion coLIectc r
Nozz LeSample
capillaryVaguutM
Flame
chamber-
Air
FueL gasFigure 1.6. Flame ionization detector.
Table 1.5. Summary of common gas chromatography detector
Detector Type Detectability Selectivity Dynamic
Range
Flame ionisation most organic 1
Mass flow 100 pg 10
detector (FID) compounds/universal
Thermal conductivity
(TCm ) concentration 1 ng universal 10
(TCD)
Photo-ionization (PID) concentration 2pg Aliphatics,107
aromatics,ketones
Esters,aldehydes, amines,
heterocyclics,
organosulfurs
Electron capture . .5
Ect ) concentration 50 fg Halides, nitrates,nitriles 10
(ECD)
anhydrides,
organometallics18
-1
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Mitheo, Yannick K. Determination of Solute Descriptors for Illicit Drugs Using Gas Chromatographic Retention Data and Abraham Solvation Model, thesis, August 2015; Denton, Texas. (https://digital.library.unt.edu/ark:/67531/metadc804935/m1/27/: accessed July 17, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; .