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GAS CHROMATOGRAPHY

Gas Chromatography
Which of the following is not used for detection in GC?

Flame ionisation
Infrared spectroscopy
Electrical conductivity
NMR

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Gas Chromatography
Which of these effects result from slow injection of a large sample volume?

Non-linear detector response
Decreased resolution
Constant resolution
Increased resolution

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Gas Chromatography
The GC trace obtained after an experiment is called a

chromatophore
chromatograph
chromatogram
graph

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Gas Chromatography
Which of the following detectors give concentration-dependent signals?

Electron-capture detector
Infra-red detector
All of these
Thermal conductivity

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Gas Chromatography
What useful information can be found from a Van Deemter plot?

Optimum column length
The selectivity factor
Optimum column temperature
Optimum mobile phase flow rate

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