In Search of Solutions: Pigments

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In Search of Solutions: Chromatography is used to identify unique pigments extracted from various plant materials. Linking to topics on chromatography and extraction.

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Pigments
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In search of solutions: Index and background
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Level

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Specification

Wales
- GCSE
  - WJEC Combined science
    - Unit 2: Chemistry 1
      - 2.1 THE NATURE OF SUBSTANCES AND CHEMICAL REACTIONS
        (i) atoms/molecules in mixtures not being chemically joined and mixtures being easily separated by physical processes such as filtration, evaporation, chromatography and distillation
        (j) chromatographic data analysis and Rf values
  - WJEC Chemistry
    - Unit 1: CHEMICAL SUBSTANCES, REACTIONS and ESSENTIAL RESOURCES
      - 1.1 THE NATURE OF SUBSTANCES AND CHEMICAL REACTIONS
        (i) atoms/molecules in mixtures not being chemically joined and mixtures being easily separated by physical processes such as filtration, evaporation, chromatography and distillation
        (j) chromatographic data analysis and Rf values
- A/AS level
  - WJEC Chemistry
    - Unit 4: ORGANIC CHEMISTRY AND ANALYSIS
      - 4.8 Organic synthesis and analysis
        (g) use of chromatographic data from TLC/paper chromatography, GC and HPLC to find the composition of mixtures
Northern Ireland
- GCSE
  - CCEA Double award science
    - Unit C1: Structures, Trends, Chemical Reactions, Quantitative Chemistry and Analysis
      - 1.9 Chemical analysis
        1.9.5 investigate practically how mixtures can be separated using filtration, crystallisation, paper chromatography, simple distillation or fractional distillation (including using fractional distillation in the laboratory to separate miscible liquids…
        1.9.6 describe paper chromatography as the separation of mixtures of soluble substances by running a solvent (mobile phase) through the mixture on the paper (stationary phase), which causes the substances to move at different rates over the paper;
        1.9.7 interpret a paper chromatogram including calculating Rf values;
  - CCEA Chemistry
    - Unit 1: Structures, Trends, Chemical Reactions, Quantitative Chemistry and Analysis
      - 1.9 Chemical analysis
        1.9.5 investigate practically how mixtures can be separated using filtration, crystallisation, paper chromatography, simple distillation or fractional distillation (including using fractional distillation in the laboratory to separate miscible liquids…
        1.9.6 describe paper chromatography as the separation of mixtures of soluble substances by running a solvent (mobile phase) through the mixture on the paper (stationary phase), which causes the substances to move at different rates over the paper;
        1.9.7 interpret a paper chromatogram including calculating Rf values;
Republic of Ireland
- Junior Cycle
  - Science
    - The nature of science
      - Investigating science
        3. Design, plan and conduct investigations; explain how reliability, accuracy, precision, fairness, safety, ethics, and the selection of suitable equipment have been considered.
        4. Produce and select data (qualitatively/ quantitatively), critically analyse data to identify patterns and relationships, identify anomalous observations, draw and justify conclusions.
        5. Review and reflect on the skills and thinking used in carrying out investigations, and apply their learning and skills to solving problems in unfamiliar contexts.
    - Chemical world
      - Building blocks
        2. Develop and use models to describe the nature of matter; demonstrate how they provide a simple way to to account for the conservation of mass, changes of state, physical change, chemical change, mixtures, and their separation.
      - Systems and interactions
        6. Investigate the properties of different materials including solubilities, conductivity, melting points and boiling points.

Job profile
Bioanalytical scientist
Claire’s work involves stress testing new medicines in various stages of drug development to ensure they are robust and reliable before being released onto the consumer market
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Analytical chemist
Tilly does research on human breath samples to potentially diagnose conditions like asthma and infectious diseases including cancer
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Associate scientist, pharmaceuticals
Holly develops new medicines at a global pharmaceutical company, AstraZeneca alongside completing her degree apprenticeship

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