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Lecture 32

CHEM 212 Lecture 32: Nov 25, 2016

3 Pages

Course Code
CHEM 212
Hamilton M.Coreen

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Chem 212 Nov. 25 2016 GC Detectors many types e.g. TCD, FID, ECD and MS can combine GGC with Mass spec > GCMS or GCMSMS or LSMSMS separation technique plus characterization technique powerful quantitative and qualitative tools ideally signal is proportional to amount go compound Thermal Conductivity, TCD senses change sin conductivity of stationary phase when a compound is eluting universal detector:r expounds to everything Large linear range > ********* Nondestructive> doesnt break up your molecule like a mass spec Not very sensitive: 10^8 g solutemL Used for gas analysis and prep scale collecting a fraction Flame ionization, FID Small H2O2 ame pyrolyzes sample compounds creating ionic species Ionic species are sensed via a current between 2 electrodes Signal proportional to number of carbon atoms Used for hydrocarbons Large linear range General purpose organics detector Destro
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