In this activity, students use a simple paper chromatography method to separate and identify the components present in commercially available food colouring. Use the extension ideas to build scientific literacy.
By the end of this activity, students should be able to:
- successfully use paper chromatography as a method of separation
- identify some of the typically used food colouring agents
- describe in simple terms the food additive numbering system
- research the reported effects colour additives have on children’s behaviour.
Download the Word file (see link below) for:
- introduction/background notes
- what you need
- what to do
- ideas to extend your students.
Related content and activity ideas
This activity is part of the wider context Food function and structure.
Having a go at chromatography – use paper chromatography to separate the dye pigments in coloured sweets.
Colour and taste – how does colour influence the senses of taste and smell?
Useful links
Food Standards Australia New Zealand has a numerical list of food additives, which lists food additive numbers and the name of the colouring agent.
These websites explore the links between food dyes and behaviour:
- Food colours and hyperactivity – NHS.uk
- How food dye can affect children – The Ohio State University
These websites have additional information about food colours and heath:
- Synthetic food colours – Ministry for Primary Industries
- Food colours – Food Standards Australia New Zealand
- Understanding Food Dye Allergies – Healthline.com
