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Gas Chromatography

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

chromatogram
chromatophore
chromatograph
graph

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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?

Increased resolution
Decreased resolution
Non-linear detector response
Constant resolution

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Gas Chromatography
Sample retention in the column is measured by

retention index
retention factor
retention time
all of these

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Gas Chromatography
What is the typical internal diameter of fused silica capillary columns?

0.3-0.5mm
0.5-1.0 mm
1.0-2.0 mm
0.2-0.3 mm

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

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

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