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Quality Standard of Erythorbic Acid | |
Item | Index (F. C. C) |
Exterior | White or slightly yellow crystalline granule or powder |
Odor | None peculiar smell |
Content | 99.0~100.5áå |
Specific Rotation [α] | -16.5°~-18.0° |
Residue on Ignition | ≤0.3% |
Heavy Metal (Pb) | ≤0.0010% |
Lead | ≤0.0005% |
Arsenic | ≤0.0003% |
Mesh Size on No.20 | Maximum 2% |
Character: Sodium Erythorbate is white or yellow white crystal grain or crystal powder, odorless, has little salt, the melting point is over 200°C, it is rather stable when being dry exposed to the air, but in the water solution, when there is air, metal, heat and light, the oxidation will occur. It easily dissolves in water, 16g/100ml at normal temperature, hardly dissolves in ethanol, the PH value of 2% water solution is 6.5-8.0
Antioxidation property: the antioxidation property of the Sodium Erythorbate is great larger than the one of cenolate (Sodium VC), has no effects to identify the Vitamin C, but it will not persuade the body to absorb and use the Sodium Erythorbate. The body culls the Sodium Erythorbate and changes it into Vitamin C inside the body.
The USA FDA (1980) has listed the Sodium Erythorbate as the general public safety substance.
The physiological effects of the Sodium Erythorbate is only the 1/20 of the VC on anti-scurvy, but it is approximately same to the VC on drop blood pressure, diuresis, generating of hepatic glycogen, discharging of pigment, detoxifcation.
The Sodium Erythorbate is mainly used in foodstuff industry, used as the antioxidant of the food, broadly used in meat food, fish food, beer, fruit juice, syrup crystal, fruit and vegetable tin, cake, dairy produce, confiture, sherry, pickles, and grease etc. the dosage to the meat foods is 0.5~1.0g/kg. To the frozen fish, the fish should be infused in the 0.1%-0.8% water solution before freezing. The dosage in the beverage such as syrup is 0.01%~0.03%, apple and bechamel tin: 0.15g/kg (dosage of single or together with the VC), luncheon meat, cooked meat powder, cooked front leg pork, cooked ham, the dosage is 0.5g/kg (dosage of single or together with the VC and other sodium salt, counted the VC ), for the peach, apple jam: 2g/kg,for the fruit tin, it is 0.75-1.5g/l, for the nature syrup, it is 0.08-0.11g/l, for the beer, it is 0.03g/l .