C4 Chemical Analysis- Using Machines OCR Gateway (9-1)

  • Created by: Aleena
  • Created on: 12-04-18 18:10
What is meant by the term, 'Instrumental Methods'?
using machines
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Where do we use instrumental methods/analysis?
Science Research labs, medical labs, police forensics work, environmental analysis & testing products in Industry
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What are the 3 advantages of using Instrumental Methods?
They are more sensitive(detect even the tiniest amounts of a substance),fast(tests can even be automated) and accurate(don't involve human error, as manual analysis does).
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Give 4 types of instrumental methods.
Infrared Spectroscopy, Ultraviolet Spectroscopy, Gas Chromatography
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What is Infrared Spectroscopy?
This method produces a graph(spectrum) showing which frequencies of infrared radiation a molecule will absorb/transmit. You can use the absorbance pattern on the graph to identify the molecule.
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What is Ultraviolet Spectroscopy?
Similar to infrared spectroscopy but uses UV instead
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What is Gas Chromatography?
Used to separate out the chemicals in a mixture.This method produces a chromatogram(graph) with one peak for each chemical. The retention time(time taken for chemical to pass thru machine) is used to identify each chemical.
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What is Mass Spectrometry?
A technique used to find relative molecular mass of a mystery compound(or relative atomic mass of a mystery element).
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Card 2

Front

Where do we use instrumental methods/analysis?

Back

Science Research labs, medical labs, police forensics work, environmental analysis & testing products in Industry

Card 3

Front

What are the 3 advantages of using Instrumental Methods?

Back

Preview of the front of card 3

Card 4

Front

Give 4 types of instrumental methods.

Back

Preview of the front of card 4

Card 5

Front

What is Infrared Spectroscopy?

Back

Preview of the front of card 5
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