C1b 5.4 What is added to our food? Food additive: a substance added to food to -keep it longer -improve taste or appearance.

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Presentation transcript:

C1b 5.4 What is added to our food? Food additive: a substance added to food to -keep it longer -improve taste or appearance

C1b 5.4 What is added to our food? Preservatives Economic to increase shelf life (make food last longer) especially foods with animal fat Eg Salt sugar vinegar sulphur dioxide Food additive: a substance added to food to -keep it longer -improve taste or appearance

C1b 5.4 What is added to our food? E numberWhat the additive doesAdditiveexample E 1... Improves appearance with natural / browning/ synthetic Colours E 150 caramel (brown) E 2... Makes food last longer (between harvesting & eating) Preservatives E 211 sodium benzoate E 3... Helps to stop food reacting with oxygen (browning of apple) Anti-oxidants E 300 vitamin C E 4... Improves texture (jam thickener) Emulsifiers Stabilisers thickeners E 440 pectin E 5... Controls pH improves taste eg fruit has sugar and acid Acidity regulators E 501 potassium carbonate E 6... Sweet, sour, bitter salt, savoury blended with smells Flavourings E 621 monosodium glutamate

C1b 5.4 What is added to our food? E numberWhat the additive doesAdditiveexample E 1... Improves appearance with natural / browning/ synthetic Colours E 150 caramel (brown) E 2... Makes food last longer (between harvesting & eating) Preservatives E 211 sodium benzoate E 3... Helps to stop food reacting with oxygen (browning of apple) Anti-oxidants E 300 vitamin C E 4... Improves texture (jam thickener) Emulsifiers Stabilisers thickeners E 440 pectin E 5... Controls pH improves taste eg fruit has sugar and acid Acidity regulators E 501 potassium carbonate E 6... Sweet, sour, bitter salt, savoury blended with smells Flavourings E 621 monosodium glutamate

C1b 5.4 What is added to our food? E numberWhat the additive doesAdditiveexample E 1... Improves appearance with natural / browning/ synthetic Colours E 150 caramel (brown) E 2... Makes food last longer (between harvesting & eating) Preservatives E 211 sodium benzoate E 3... Helps to stop food reacting with oxygen (browning of apple) Anti-oxidants E 300 vitamin C E 4... Improves texture (jam thickener) Emulsifiers Stabilisers thickeners E 440 pectin E 5... Controls pH improves taste eg fruit has sugar and acid Acidity regulators E 501 potassium carbonate E 6... Sweet, sour, bitter salt, savoury blended with smells Flavourings E 621 monosodium glutamate

C1b 5.4 What is added to our food? E numberWhat the additive doesAdditiveexample E 1... Improves appearance with natural / browning/ synthetic Colours E 150 caramel (brown) E 2... Makes food last longer (between harvesting & eating) Preservatives E 211 sodium benzoate E 3... Helps to stop food reacting with oxygen (browning of apple) Anti-oxidants E 300 vitamin C E 4... *prevents emulsions breaking down -Improves texture (jam thickener) Emulsifiers *Stabilisers -thickeners * locust bean gum E410 - pectin E 440 E 5... Controls pH improves taste eg fruit has sugar and acid Acidity regulators E 501 potassium carbonate E 6... Sweet, sour, bitter salt, savoury blended with smells Flavourings E 621 monosodium glutamate

C1b 5.4 What is added to our food? E numberWhat the additive doesAdditiveexample E 1... Improves appearance with natural / browning/ synthetic Colours E 150 caramel (brown) E 2... Makes food last longer (between harvesting & eating) Preservatives E 211 sodium benzoate E 3... Helps to stop food reacting with oxygen (browning of apple) Anti-oxidants E 300 vitamin C E 4... Emulsifiers Stabilisers thickeners E 5... Controls pH improves taste eg fruit has sugar and acid Acidity regulators E 501 potassium carbonate E 6... Sweet, sour, bitter salt, savoury blended with smells Flavourings E 621 monosodium glutamate *prevents emulsions breaking down -Improves texture (jam thickener) * locust bean gum E410 - pectin E 440

C1b 5.4 What is added to our food? E numberWhat the additive doesAdditiveexample E 1... Improves appearance with natural / browning/ synthetic Colours E 150 caramel (brown) E 2... Makes food last longer (between harvesting & eating) Preservatives E 211 sodium benzoate E 3... Helps to stop food reacting with oxygen (browning of apple) Anti-oxidants E 300 vitamin C E 4... Emulsifiers Stabilisers thickeners E 5... Controls pH improves taste eg fruit has sugar and acid Acidity regulators E 501 potassium carbonate E 6... Sweet, sour, bitter, salt, savoury blended with smells Flavourings E 621 monosodium glutamate *prevents emulsions breaking down -Improves texture (jam thickener) * locust bean gum E410 - pectin E 440

C1b 5.4 What is added to our food? E numberWhat the additive doesAdditiveexample E 1... Improves appearance with natural / browning/ synthetic Colours E 150 caramel (brown) E 2... Makes food last longer (between harvesting & eating) Preservatives E 211 sodium benzoate E 3... Helps to stop food reacting with oxygen (browning of apple) Anti-oxidants E 300 vitamin C E 4... Emulsifiers Stabilisers thickeners E 5... Controls pH improves taste eg fruit has sugar and acid Acidity regulators E 501 potassium carbonate E 6... Sweet, sour, bitter, salt, savoury blended with smells Flavourings E 621 monosodium glutamate *prevents emulsions breaking down -Improves texture (jam thickener) * locust bean gum E410 - pectin E 440

C1b 5.4 What is added to our food? E numberWhat the additive doesAdditiveexample E 1... Improves ………………………… with natural / browning/ synthetic Colours E 150 caramel (brown) E 2... Makes food ………. ……………... (between harvesting & eating) P…………...s E 211 sodium benzoate E 3... Helps to stop food reacting with …………………. (browning of apple) Anti-…………... E 300 ……………………... E.... Improves texture (……… ……………………..) E…….……... S.…………... thickeners E 440 ……………………….. E.... Controls ….. improves ………….. eg fruit has sugar and acid Acidity regulators E 501 potassium carbonate E..... ………..., ……….., ………….., salt, savoury blended with smells F……………...s E 621 mono………………. ……………………….

C1b 5.4 What is added to our food? Detecting Additives Chromatography Mass Spectrometer Food additive: a substance added to food to -keep it longer -improve taste or appearance

C1b 5.4 What is added to our food? Chromatography This technique separates different compounds based on their solubility in a solvent which effects how far they travel across a surface.

C1b 5.4 What is added to our food? Chromatography This technique separates different compounds based on their solubility in a solvent which effects how far they travel across a surface. Eg paper

C1b 5.4 What is added to our food? Mass Spectrometer This technique identifies both: elements and compounds and measures the relative formula mass

C1b 5.4 What is added to our food? Mass Spectrometer FT-ICR MS can resolve dozens of peaks at the same nominal mass, as shown in this expanded view of a negative-ion spectrum of an olive oil.. (Fourier-transform Ion Cyclotron Resonance) This technique identifies both: elements and compounds and measures the relative formula mass

C1b 5.4 What is added to our food? Mass Spectrometer This technique identifies both: elements and compounds and measures the relative formula mass

C1b 5.4 What is added to our food? Mass Spectrometer This technique identifies both: elements and compounds and measures the relative formula mass Complete analysis of vegetable oils has yielded markers, such as the relative abundance of C 18 fatty acids with zero, one, two, or three double bonds, that can be used to check the purity of different oils.

C1b 5.4 What is added to our food? Food additive: a substance added to food to -keep it longer -improve taste or appearance

C1b 5.4 What is added to our food?