Ways of Analysing Substances

The different ways of analysing substances included in C2.3, including Paper Chromatograpgy, Instrumental methods and Gas Chromatography.

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  • Chemistry- Analysing Data
    • Paper Chromotography
      • Some compounds dissolve in a mixture easier than others, solvents in particular.
      • The solubility determines how far they travel across the paper
  • E numbers are a code to identify the four additives
    • Paper Chromotography
      • Some compounds dissolve in a mixture easier than others, solvents in particular.
      • The solubility determines how far they travel across the paper
  • A forward additive is added to make it last longer.
    • 'Chromo' means colour.
      • Instrumental Methods- Mahchines analysing things
        • Chemistry- Analysing Data
        • Advantages
          • Instrumental Methods- Mahchines analysing things
          • Highly Accurate and Sensitive
            • Advantages
            • Quicker
              • It enables very small substances to ba analysed
                • Uses
                  • Fighting Pollution
                    • Uses
                    • Health Care
                      • Analysing Products
                        • Disadvantages
                          • Expensive
                            • Disadvantages
                            • Takes special training to use
                              • The resaults have to be compared with known sources
                                • Gas Chromotograogy linked to Mass Spectronomy
                                  • They pass vapours through a column and detect them as they leave the collumn at different times.
                                    • Gas Chromotograogy linked to Mass Spectronomy
                                    • Retention time is the time it takes a component in a mixture to pass through the column
                                      • Different subastances have different retention times due to how string or weak the attractions are towards the material

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