C1b 5.4 What is added to our food?

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 Saltsugar

vinegarsulphur dioxide

Food additive:a substance added to food to-keep it longer-improve taste or appearance


E number What the additive doesAdditive example

E 1...Improves appearance with

natural / browning/ syntheticColours

E 150caramel(brown)

E 2...Makes food last longer

(between harvesting & eating)Preservatives

E 211sodium benzoate

E 3...Helps to stop food

reacting with oxygen(browning of apple)

Anti-oxidantsE 300

vitamin C

E 4...Improves texture(jam thickener)

EmulsifiersStabilisersthickeners

E 440pectin

E 5...Controls pH

improves taste eg fruit has sugar and acid

Acidity regulators E 501potassium carbonate

E 6...Sweet, sour, bitter salt, savoury

blended with smellsFlavourings

E 621monosodium

glutamate





E 150caramel(brown)






Anti-oxidantsE 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





E 621monosodium

glutamate





E 150caramel(brown)






Anti-oxidantsE 300

vitamin C

E 4...EmulsifiersStabilisersthickeners

E 5...Controls pH





E 621monosodium

glutamate

*prevents emulsions breaking down-Improves texture (jam thickener)






E 150caramel(brown)






Anti-oxidantsE 300

vitamin C

E 4...EmulsifiersStabilisersthickeners

E 5...Controls pH



E 6...Sweet, sour, bitter, salt, savoury


E 621monosodium

glutamate

*prevents emulsions breaking down-Improves texture (jam thickener)




E 1...Improves ………………………… with


E 150caramel(brown)

E 2...Makes food ………. ……………...

(between harvesting & eating)P…………...s



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


E .....………..., ……….., ………….., salt, savoury

blended with smellsF……………...s

E 621mono……………….……………………….


Detecting Additives

Chromatography

MassSpectrometer

Food additive:a substance added to food to-keep it longer-improve taste or appearance


Chromatography

This technique separates different compounds based ontheir solubility in a solventwhich effects how far they travel across a surface.


Chromatography

This technique separates different compounds based ontheir solubility in a solventwhich effects how far they travel across a surface.Eg paper


MassSpectrometer

This technique identifies both:elements and compoundsand measures the relative formula mass


MassSpectrometer

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)



MassSpectrometer



MassSpectrometer


Complete analysis of vegetable oils has yielded markers,

such as the relative abundance of

C18 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?

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