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GAS CHROMATOGRAPHY

Friday, July 11, 2008. Summary of common GC detectors:. Halides, nitrates, nitriles, peroxides, anhydrides, organometallics. Hydrogen and air possibly oxygen. Phosphorus, tin, boron, arsenic, germanium, selenium, chromium. Aliphatics, aromatics, ketones, esters, aldehydes, amines, heterocyclics, organosulphurs, some organometallics. Halide, nitrogen, nitrosamine, sulphur. Wednesday, July 9, 2008. Carrier gas in GC. Sunday, July 6, 2008. Sensitivity: 1-10 ng (full scan); 1-10 pg (SIM). Selectivity: Haloge...

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GAS CHROMATOGRAPHY | gunasekar-chromatography.blogspot.com Reviews

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Friday, July 11, 2008. Summary of common GC detectors:. Halides, nitrates, nitriles, peroxides, anhydrides, organometallics. Hydrogen and air possibly oxygen. Phosphorus, tin, boron, arsenic, germanium, selenium, chromium. Aliphatics, aromatics, ketones, esters, aldehydes, amines, heterocyclics, organosulphurs, some organometallics. Halide, nitrogen, nitrosamine, sulphur. Wednesday, July 9, 2008. Carrier gas in GC. Sunday, July 6, 2008. Sensitivity: 1-10 ng (full scan); 1-10 pg (SIM). Selectivity: Haloge...

<META> KEYWORDS

1 gas chromatography

2 detector

3 type

4 support gases

5 selectivity

6 detectability

7 dynamic range

8 flame ionization fid

9 mass flow

10 hydrogen and air

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gas chromatography,detector,type,support gases,selectivity,detectability,dynamic range,flame ionization fid,mass flow,hydrogen and air,most organic cpds,thermal conductivity tcd,concentration,reference,universal,electron capture ecd,make up,sulphur,hplc

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GAS CHROMATOGRAPHY | gunasekar-chromatography.blogspot.com Reviews

https://gunasekar-chromatography.blogspot.com

Friday, July 11, 2008. Summary of common GC detectors:. Halides, nitrates, nitriles, peroxides, anhydrides, organometallics. Hydrogen and air possibly oxygen. Phosphorus, tin, boron, arsenic, germanium, selenium, chromium. Aliphatics, aromatics, ketones, esters, aldehydes, amines, heterocyclics, organosulphurs, some organometallics. Halide, nitrogen, nitrosamine, sulphur. Wednesday, July 9, 2008. Carrier gas in GC. Sunday, July 6, 2008. Sensitivity: 1-10 ng (full scan); 1-10 pg (SIM). Selectivity: Haloge...

INTERNAL PAGES

gunasekar-chromatography.blogspot.com

1

GAS CHROMATOGRAPHY: PHOTOIONIZATION DETECTOR (PID):

http://gunasekar-chromatography.blogspot.com/2008/07/photoionization-detector-pid.html

Sunday, July 6, 2008. Mechanism: Compounds eluting into a cell are bombarded with high energy photons emitted from a lamp. Compounds with ionization potentials below the photon energy are ionized. The resulting ions are attracted to an electrode, measured, and a signal is generated. Selectivity: Depends on lamp energy. Usually used for aromatics and olefins (10 eV lamp). Sensitivity: 25-50 pg (aromatics); 50-200 pg (olefins). Gases: Makeup - same as the carrier gas. Subscribe to: Post Comments (Atom).

2

GAS CHROMATOGRAPHY: ELECTROLYTIC CONDUCTIVITY DETECTOR (ELCD):

http://gunasekar-chromatography.blogspot.com/2008/07/electrolytic-conductivity-detector-elcd.html

Sunday, July 6, 2008. ELECTROLYTIC CONDUCTIVITY DETECTOR (ELCD):. Mechanism: Compounds are mixed with a reaction gas and passed through a high temperature reaction tube. Specific reaction products are created which mix with a solvent and pass through an electrolytic conductivity cell. The change in the electrolytic conductivity of the solvent is measured and a signal is generated. Reaction tube temperature and solvent determine which types of compounds are detected. Subscribe to: Post Comments (Atom).

3

GAS CHROMATOGRAPHY: Gas Chromatography

http://gunasekar-chromatography.blogspot.com/2008/07/gas-chromatography_06.html

Sunday, July 6, 2008. This technique was first carried out in Austria, and the first exploitation of the method was made by Martin and A T James in 1952, when they reported the gas chromatography of organic acids and amines. The "support" was coated with a non-volatile liquid and placed into a heated glass tube. Mixtures injected into the tube and carried through by compressed gas resulted in well defined zones. Subscribe to: Post Comments (Atom). Which is the Best Hplc? GC COLUMN TEMPERATURE LIMITS:.

4

GAS CHROMATOGRAPHY: NITROGEN PHOSPHORUS DETECTOR (NPD):

http://gunasekar-chromatography.blogspot.com/2008/07/nitrogen-phosphorus-detector-npd.html

Sunday, July 6, 2008. NITROGEN PHOSPHORUS DETECTOR (NPD):. Mechanism: Compounds are burned in a plasma surrounding a rubidium bead supplied with hydrogen and air. Nitrogen and phosphorous containing compounds produce ions that are attracted to the collector. The number of ions hitting the collector is measured and a signal is generated. Selectivity: Nitrogen and phosphorous containing compounds. Gases: Combustion - hydrogen and air; Makeup - helium. Subscribe to: Post Comments (Atom). Carrier gas in GC.

5

GAS CHROMATOGRAPHY: MASS SPECTROMETER (MS):

http://gunasekar-chromatography.blogspot.com/2008/07/mass-spectrometer-ms.html

Sunday, July 6, 2008. Selectivity: Any compound that produces fragments within the selected mass range. May be an inclusive range of masses (full scan) or only select ions (SIM). Sensitivity: 1-10 ng (full scan); 1-10 pg (SIM). Temperature: 250-300°C (transfer line), 150-250°C (source). Subscribe to: Post Comments (Atom). Which is the Best Hplc? THE PRINCIPLES OF GAS CHROMATOGRAPHY. GC COLUMN TEMPERATURE LIMITS:. FLAME IONIZATION DETECTOR (FID):. NITROGEN PHOSPHORUS DETECTOR (NPD):. Carrier gas in GC.

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GAS CHROMATOGRAPHY

Friday, July 11, 2008. Summary of common GC detectors:. Halides, nitrates, nitriles, peroxides, anhydrides, organometallics. Hydrogen and air possibly oxygen. Phosphorus, tin, boron, arsenic, germanium, selenium, chromium. Aliphatics, aromatics, ketones, esters, aldehydes, amines, heterocyclics, organosulphurs, some organometallics. Halide, nitrogen, nitrosamine, sulphur. Wednesday, July 9, 2008. Carrier gas in GC. Sunday, July 6, 2008. Sensitivity: 1-10 ng (full scan); 1-10 pg (SIM). Selectivity: Haloge...

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