The sample is dissolved in a solvent, then injected into one end of the column.
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Describe step 2 of Gas Chromatography.
An unreactive gas - usually nitrogen - carries the sample through the column.
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What happens in the third step of Gas Chromatography?
Different substances in the sample travel through the column at different speeds and so become separated from each other.
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Descibe the last step in Gas Chromatography.
The separated substances leave the column one after the other. As they leave, they are detected by a detector.
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Name another type of Chromatography.
Paper Chromatography- used to analyse coloured substances, such as coloured pigments in plants and artificial colourants in foods.
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Name advantages of instrumental analysis.
Fast, Accurate (they reliably identify elements and compounds),Sensitive (they can detect very small amounts of a substance in a small amount of sample)
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Other cards in this set
Card 2
Front
Describe step 2 of Gas Chromatography.
Back
An unreactive gas - usually nitrogen - carries the sample through the column.
Card 3
Front
What happens in the third step of Gas Chromatography?
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