polyamides and polyesters due to hydrolysis. The advantages and disadvantages of different methods of disposal, including recycling. 3.3.16 Chromatography. 0.6 Understand the different Students explain how the different January 2011 Unit 4 RCS video on TLC: weeks of chromatography. of chromatography are used to Q4f Thin-layer separate and identify compounds in GC-MS video: chromatography. Calculate Rf values from a a mixture. thin-layer chromatogram. Column Students interpret AQA Chromatography Teachers’ chromatography. Compare retention times chromatograms. Notes: and Rf values with Gas chromatography. standards to identify Students use data to calculate Rf different substances. values revise mass spectrometry. GC-MS. 3.3.13.1 Draw the structures 0.6 of June 2013 Amino acids, proteins and enzymes: Amino acids. amino acids as zwitterions weeks Unit 4 Q6 and the ions formed from Draw the structure of amino acids in acid and January 2012 AQA Biochemistry Teachers’ Notes: given amino acids in alkaline solution. Unit 4 Q7 acidic solution, alkaline solution and as January 2005 zwitterions. Unit 4 Q2 June 2011
polyamides and polyesters due to hydrolysis. The advantages and disadvantages of different methods of disposal, including recycling. 3.3.16 Chromatography. Thin-layer chromatography. Column chromatography. Gas chromatography. GC-MS. 0.6 weeks Understand the different of chromatography. Calculate Rf values from a thin-layer chromatogram. Compare retention times and Rf values with standards to identify different substances. Students explain how the different of chromatography are used to separate and identify compounds in a mixture. Students interpret chromatograms. Students use data to calculate Rf values revise mass spectrometry. January 2011 Unit 4 Q4f RCS video on TLC: GC-MS video: AQA Chromatography Teachers’ Notes: 3.3.13.1 Amino acids. Draw the structure of given amino acids in acidic solution, alkaline solution and as zwitterions. 0.6 weeks Draw the structures of amino acids as zwitterions and the ions formed from amino acids in acid and alkaline solution. June 2013 Unit 4 Q6 January 2012 Unit 4 Q7 January 2005 Unit 4 Q2 June 2011 Amino acids, proteins and enzymes: AQA Biochemistry Teachers’ Notes: