Food Saftey(level 3)...Colouring Agents Emulsifiers, Stabilizers and Thickeners Nutrients...
Transcript of Food Saftey(level 3)...Colouring Agents Emulsifiers, Stabilizers and Thickeners Nutrients...
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Food Additives FS0724
Food Saftey (level 3)
Prepared byDr. Mahmoud H. Mohamed Dr. Galal A. Ghazal
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Emulsifiers, Stabilizers and Thickeners
Carboxymethymethylcellulose
Xanthan Gum Pectin Dextrins Sodium Alginate
PreservativesFlavouring AgentsColouring AgentsEmulsifiers, Stabilizers and ThickenersNutrientsAntioxidantsHarmful Effects of Food AdditivesMonitoring of Use of Food Additives
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Physical Conditioning agents E400-499
Classes Examples Use Origin Function
Emusifiers Lecithin
Alginates E401-404
MayonnaiseHollandaiseIce cream
Eggs, soya beansSea weed
To make permanent emulsions
Stabilisers CarageenGuar gumE412
Ice creamConfectionary
Sea weedGuar plant
To stabilise emulsions by thickening them
Poly-phosphates
Magnesium carbonate
Salt- as anti-caking agent,Cake mixes
Lab To prevent lumping
Pectin E440 Jams / jellies fruit cell walls To set mixturesHumectants Sweetners
sorbital and mannitol
Confectionary and sweetsCakes/ buns
Lichen They absorb water vapour from air and keep foods moist
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Nutrients
Vitamins Minerals & Iodine
PreservativesFlavouring AgentsColouring AgentsEmulsifiers, Stabilizers and ThickenersNutrientsAntioxidantsHarmful Effects of Food AdditivesMonitoring of Use of Food Additives
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Sweeteners E900-E999Class Examples Use Origin Functions
Natural FructoseSucrose
Glucose syrup
Tinned peasBiscuits, sweets, tinned fruitTinned fruit, jelly
FruitSugar beet & sugar cane
Fruit & honey
To sweeten food
Artificial Aspartame E951“Nutrasweet, Canderel”Saccharine E954‘Hermesetes’
Diet drinksSweetener
Diet drinksSweetener
Dipeptide(aspartic acid+ phenyalanine)
Coal tar
Used in low calorie / diabetic food & drinks
BulkSweetners
Sorbitol
Mannitol E965
Diabetic food, sugar free foodSugar free gum, ice cream
Lichens
Lichens
Sorbitol used in diabetic food as it does not need insulin
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Antioxidants
Ascorbic Acid and Ascorbates
BHA and BHT
PreservativesFlavouring AgentsColouring AgentsEmulsifiers, Stabilizers and ThickenersNutrientsAntioxidantsHarmful Effects of Food AdditivesMonitoring of Use of Food Additives
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Antioxidants E300-399
Classes Examples Use Origins Functions
Natural Ascorbic acidTocopherol(E306)
Fruit drinks
Vegetable oils
Fruit & veg.Nuts & seeds
Prevents oxidation where food is spoiled by reacting with oxygen
Artificial BHA (E320)
BHT (E321)
Stock cubes, cheese spreadChewing gum
Made in lab
BHA and BHT not permitted in baby food
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BHA and BHT
BHA (butylated hydroxyanisole)BHT (butylated hydroxytoluene)Commonly used antioxidants for fat-solublefatty productsSimilar properties to thenatural antioxidant,vitamin E
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BHA and BHT
They appear to work by donating the H atom of the –OH group to the free hydroperoxide redical (ROO·) involved in the autoxidation of fats and oil, thereby stopping the chain reactions in oxidative spoilage.
AH + ROO· ROOH + A·where AH represents the antioxidant, and A is a radical derived from the antioxidante.g. O·
C(CH3)3
OCH3
O·
C(CH3)3
OCH3Antioxidant radicals from BHA
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Additives…
Butylated Hydroxytoluene (BHT) cereal, chewing gum, & potato chips as
an antioxidant. It keeps oils from going rancid.
Gums: (Arabic, guar, locust bean) used in beverages, candy, cottage
cheese, dough, drink mixes, frozen pudding, ice cream, salad dressings as stabilizers & thickening agents
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Ascorbic Acid and Ascorbates
Ascorbic AcidChemical name of Vitamin CReducing in natureReduce the amount of dissolved oxygen in food
Ascorbic Acid and AscorbatesAntioxidants for water-soluble fatty products
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Common Food Additives:
Ascorbic Acid: used in cereals, cured meats & fruit drinks
as an antioxidant, colour stabilizer or as a nutrient
Artificial & natural flavouring: used in cereals, candy, gelatin, desserts,
soft drinks &many other foods as “mimic” of natural flavours