GAS CHROMATOGRAPHY – MASS SPECTROMETRY, GC-MS • Explain that mass spectrometry can be combined

with gas chromatography in GC–MS to provide a far more powerful analytical tool than gas chromatography alone.

• Explain that the mass spectra generated can be analysed or compared with spectral databases for positive identification of a component.

• State the use of GC–MS in analysis in forensics, environmental analysis, airport security and space probes.

BRAINSTORM

In pairs, write down as much as you can remember about GC-MS from AS

USES FOR MASS SPECTROMETRY

At A2 you may be expected to interpret gas chromatograms and mass spectra which you did in AS. Make sure you can!

If you want practise or some further examples, try this website http://www.rsc.org/learn-chemistry/collections/spectroscopy where there are lots of resources and examples to have a go at!

USES FOR MASS SPECTROMETRY

Research and create a short presentation (2 minutes) summarising how GC-MS can be used in analysis e.g. Forensics, Environmental analysis Airport security Space probes Drug testing (athletics)

You should include why it is used and what it is used to detect

PRESENTATIONS

QUESTIONS

Complete questions 1 – 3 on page 83