Gas Chromatography (AQA A-Level Chemistry): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Which gases are commonly used as the mobile phase in gas chromatography?
Which gases are commonly used as the mobile phase in gas chromatography?
Nitrogen or helium
What is the stationary phase coated with in gas chromatography?
What is the stationary phase coated with in gas chromatography?
A viscous liquid such as oil
What type of mixtures does gas chromatography separate?
What type of mixtures does gas chromatography separate?
Mixtures of volatile liquids
What does the oven do to the sample in gas chromatography?
What does the oven do to the sample in gas chromatography?
Heats it to high temperature, converting to gas
What does the chromatogram show in gas chromatography?
What does the chromatogram show in gas chromatography?
Time for each substance to pass through column
What does the size of the signal indicate in a chromatogram?
What does the size of the signal indicate in a chromatogram?
Amount of that substance in the mixture
How are substances separated in gas chromatography?
How are substances separated in gas chromatography?
By affinity for stationary and mobile phases
What does GC-MS combine?
What does GC-MS combine?
GC separation with MS identification
What does the mass spectrometer generate for each component?
What does the mass spectrometer generate for each component?
A mass spectrum
How does MS identify molecules in GC-MS?
How does MS identify molecules in GC-MS?
Fragmentation pattern or precise mass