Exercise: Gas Chromatography

Questions for: Gas Chromatography

What is the typical internal diameter of fused silica capillary columns?
A:
0.2-0.3 mm
B:
0.3-0.5mm
C:
0.5-1.0 mm
D:
1.0-2.0 mm
Answer: A
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What useful information can be found from a Van Deemter plot?
A:
The selectivity factor
B:
Optimum mobile phase flow rate
C:
Optimum column temperature
D:
Optimum column length
Answer: B
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Which of the following detectors give concentration-dependent signals?
A:
Electron-capture detector
B:
Thermal conductivity
C:
Infra-red detector
D:
All of these
Answer: D
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The GC trace obtained after an experiment is called a
A:
chromatograph
B:
chromatogram
C:
chromatophore
D:
graph
Answer: B
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Which of these effects result from slow injection of a large sample volume?
A:
Increased resolution
B:
Decreased resolution
C:
Non-linear detector response
D:
Constant resolution
Answer: B
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