1. Heinemann Chemistry 2 (4th edition) ISBN 978 1 74081 6564Heinemann Chemistry 2 © Harcourt Education, a division of Pearson Australia Group Pty Ltd 2007 Figure 6.2 Thin-layer chromatography of three different food colours (A, B and C). A number of chemicals once used as food colours are now regarded as hazardous and can be detected by this method.

2. Heinemann Chemistry 2 (4th edition) ISBN 978 1 74081 6564Heinemann Chemistry 2 © Harcourt Education, a division of Pearson Australia Group Pty Ltd 2007 Figure 6.3 Calculation of the R f values of components on a chromatogram.

3. Heinemann Chemistry 2 (4th edition) ISBN 978 1 74081 6564Heinemann Chemistry 2 © Harcourt Education, a division of Pearson Australia Group Pty Ltd 2007 Figure 6.4 Chromatogram for Question 1.

4. Heinemann Chemistry 2 (4th edition) ISBN 978 1 74081 6564Heinemann Chemistry 2 © Harcourt Education, a division of Pearson Australia Group Pty Ltd 2007 Table 6.2 R f values of some plant materials.

5. Heinemann Chemistry 2 (4th edition) ISBN 978 1 74081 6564Heinemann Chemistry 2 © Harcourt Education, a division of Pearson Australia Group Pty Ltd 2007 Figure 6.5 Using column chromatography to separate the components in a mixture.

6. Heinemann Chemistry 2 (4th edition) ISBN 978 1 74081 6564Heinemann Chemistry 2 © Harcourt Education, a division of Pearson Australia Group Pty Ltd 2007 Figure 6.6 The construction of a high performance liquid chromatograph.

7. Heinemann Chemistry 2 (4th edition) ISBN 978 1 74081 6564Heinemann Chemistry 2 © Harcourt Education, a division of Pearson Australia Group Pty Ltd 2007 Figure 6.9 A gas chromatograph.

8. Heinemann Chemistry 2 (4th edition) ISBN 978 1 74081 6564Heinemann Chemistry 2 © Harcourt Education, a division of Pearson Australia Group Pty Ltd 2007 Figure 6.10 Section through a GLC column.

9. Heinemann Chemistry 2 (4th edition) ISBN 978 1 74081 6564Heinemann Chemistry 2 © Harcourt Education, a division of Pearson Australia Group Pty Ltd 2007 Figure 6.11 Gas chromatogram of a petrol sample.

10. Heinemann Chemistry 2 (4th edition) ISBN 978 1 74081 6564Heinemann Chemistry 2 © Harcourt Education, a division of Pearson Australia Group Pty Ltd 2007 Figure 6.12 Chromatogram of a reference sample containing a mixture of butane, 2-methylbutane, hexane, benzene and 2-methylhexane.

11. Heinemann Chemistry 2 (4th edition) ISBN 978 1 74081 6564Heinemann Chemistry 2 © Harcourt Education, a division of Pearson Australia Group Pty Ltd 2007 Figure 6.13 Petrol sample spiked with benzene.

12. Heinemann Chemistry 2 (4th edition) ISBN 978 1 74081 6564Heinemann Chemistry 2 © Harcourt Education, a division of Pearson Australia Group Pty Ltd 2007 Figure 6.14 Chromatogram of standard samples of benzene and an unknown sample.

13. Heinemann Chemistry 2 (4th edition) ISBN 978 1 74081 6564Heinemann Chemistry 2 © Harcourt Education, a division of Pearson Australia Group Pty Ltd 2007 Figure 6.15 Calibration graph for benzene in petrol.

14. Heinemann Chemistry 2 (4th edition) ISBN 978 1 74081 6564Heinemann Chemistry 2 © Harcourt Education, a division of Pearson Australia Group Pty Ltd 2007 Table 6.4 R f values of some amino acids.

15. Heinemann Chemistry 2 (4th edition) ISBN 978 1 74081 6564Heinemann Chemistry 2 © Harcourt Education, a division of Pearson Australia Group Pty Ltd 2007 Figure 6.17 Chromatogram using Solvent 1.

16. Heinemann Chemistry 2 (4th edition) ISBN 978 1 74081 6564Heinemann Chemistry 2 © Harcourt Education, a division of Pearson Australia Group Pty Ltd 2007 Figure 6.18 Chromatogram using solvent 2.

17. Heinemann Chemistry 2 (4th edition) ISBN 978 1 74081 6564Heinemann Chemistry 2 © Harcourt Education, a division of Pearson Australia Group Pty Ltd 2007 Figure 6.19 Solvent fronts: amino acids.

18. Heinemann Chemistry 2 (4th edition) ISBN 978 1 74081 6564Heinemann Chemistry 2 © Harcourt Education, a division of Pearson Australia Group Pty Ltd 2007 Figure 6.20 Chromatograms produced for suspected contaminated water sample and parathion standards.

19. Heinemann Chemistry 2 (4th edition) ISBN 978 1 74081 6564Heinemann Chemistry 2 © Harcourt Education, a division of Pearson Australia Group Pty Ltd 2007 Figure 6.21 Chromatogram of four hydrocarbons.

20. Heinemann Chemistry 2 (4th edition) ISBN 978 1 74081 6564Heinemann Chemistry 2 © Harcourt Education, a division of Pearson Australia Group Pty Ltd 2007 Figure 6.22 Chromatogram of herbal tea extract.

21. Heinemann Chemistry 2 (4th edition) ISBN 978 1 74081 6564Heinemann Chemistry 2 © Harcourt Education, a division of Pearson Australia Group Pty Ltd 2007 Table (Q20) Results for nitroglycerine standards and sample.