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Food additives data book - wordpres

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SOLUBILITY % AT VARIOUS TEMPERATURE/pH COMBINATIONS:<br />

L-ascorbic acid Erythorbic acid<br />

in water: @ 20°C 33 40<br />

in vegetable oil: @ 20°C Insoluble Insoluble<br />

in ethanol solution: @ 100% 2 —<br />

FUNCTION IN FOODS: L-ascorbic acid: antioxidant activity is due to quenching of various forms of oxygen (singlet oxygen,<br />

hydroxyl radicals as well as superoxide), reduction of free radicals, thus terminating radical reaction.<br />

Acts as a synergist. Functions as vitamin C, colour fixing, flavouring, raising agent, oxidant and a<br />

reducing agent. Prevents enzymatic browning of fruits and vegetables.<br />

Erythorbic acid: weaker antioxidant than L-ascorbic acid, enhances curing action of nitrites on meat<br />

pigments, stabilises colour of meat, meat products and fruits, inhibits growth of microorganisms and<br />

formation of N-nitrosamines in cured meats.<br />

TECHNOLOGY OF USE IN FOODS: Apply to surfaces of cured meat cuts, easily oxidised on exposure to air in aqueous solutions<br />

SYNERGISTS: a-Tocopherol/ Citric acid/ BHA/ BHT<br />

FOOD SAFETY ISSUES: Avoid acrid smoke and irritating fumes when heated<br />

LEGISLATION: L-ascorbic acid:<br />

USA: UK and EUROPE: AUSTRALIA/PACIFIC RIM:<br />

FDA and USDA: approved approved Japan: approved<br />

Erythorbic acid:<br />

USA: AUSTRALIA/PACIFIC RIM:<br />

USDA and FDA: approved Japan: restricted for purpose as antioxidant<br />

Ascorbic acid and isomers 77

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