ColourPreservative  Antioxidants  Flavourings and preservatives.

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Presentation transcript:

ColourPreservative

 Antioxidants  Flavourings and preservatives

 Emulsifiers and thickeners  Acidity regulators

 Food must be safe Scientists have many chemical instruments to identify unknown chemicals.  Chromatography is one technique

 Set up a chromatogram.  Which inks contain more than one dye

 Why are substances added to food?  What is an E number?  Name and describe a technique used to detect food additives

 What happens when you make a paper chromatogram of coloured inks