Two kinds of food additives, namely, potassium citrate and calcium phosphate, are introduced in this paper. The quality standard, the identification method and the application range are used.

Potassium citrate

Citrate Potassium (Citrate Tripotassium)

Citric acid, citric acid, three

Code GB 1.304; INS 332 (II)

Properties colorless transparent crystal or white granular powder. Odorless, salty, cool feeling, the relative density of 1.98, heating to 230 DEG C when melting and decomposition, moisture absorption and easy deliquescence in the air. 1g soluble in about 0.5mL water, soluble in glycerol, almost insoluble in ethanol.

The preparation method of citric acid and potassium hydroxide or potassium carbonate and preparation.

quality standard

Method for the identification of this product 5% solution is potassium citrate reaction and reaction.

Identification method of potassium carbonate. 1 potassium salt reaction.

2 citrate reaction see the method for the identification of sodium citrate.

Toxicological basis

1.LD50 dogs injected with 167mg/kg body weight.

FDA 21CFRR 182.1625182.6625 2.GRAS.

3.ADI does not need to be specified (FAO/WHO, 1998).

Use of acidity regulator, chelating agent, stabilizer, etc..

Use of the scope and use of China's "food additive 2920-86 GB" (health standards) requirements: according to the production needs of the amount of food for all kinds of food.

Calcium phosphate

Phosphate Tricalcium (Phosphate Calcium, Tribasic)

Calcium phosphate, calcium phosphate, calcium phosphate

Code GB 2.003; INS 341 (III)

Properties: white powder, odorless, tasteless, stable in air, relative density is about 3.18, 16.7 DEG C melting point, difficult soluble in water (100g water can be dissolved 0.0025g, with slightly higher water solubility of carbon dioxide) and insoluble in acetic acid, but soluble in dilute hydrochloric acid and nitric acid.

System of law

(1) the effect of calcium chloride and sodium phosphate.

(2) prepared by the reaction of hydrated lime with phosphoric acid.

quality standard

Methods for the identification of phosphate reaction and calcium salt reaction.

1 phosphate reaction will be the product with silver nitrate solution (1+50) wetting, yellow.

2 calcium salt reaction to take this product 0.1g, add acetic acid (1+3) 5mL boiling, cooling after filtering, to the filtrate with ammonium oxalate solution (1+30) 5mL, resulting in white precipitation.

Toxicological basis

FDA-21CFR 181.29182.1217182.5212182.8217 1.GRAS.

MTDI 70mg/kg 2.ADI body weight (with a variety of sources of total phosphorus, FAO/WHO, 1994).

The use of anti caking agent, water retention agent, acidity regulator, stabilizer, nutrition enhancer.

Use scope and usage

(1) according to China's "food additives using health standards" (2920-1996 GB): for wheat flour, the maximum use of 0.03g; /kg (flour); solid beverage for 8.0g/kg.

This product can be used as water retaining agent for flour.

Coadministration of 10G / kg (2) specified by FAO / who, as anti caking agent for grape sugar, sucrose powder, the largest amount is 15g / kg (alone or with other anti caking agent combination does not exist starch, milk powder, butter powder is 5g / kg (alone or with other stabilizers used in combination with anhydrous); used for automatic vending machines, milk powder, cream powder 1g / kg (alone or with other anti caking agents combined), soup and soup was 15mg / kg (alone or with stearate and silica, dehydrated products), cocoa powder and sugar to be powder 10g / kg (alone or with other anti caking agent combination of sugar sweetened cocoa powder only for vending machine).

As stabilizer for evaporated milk, sweetened condensed milk, cream, the dosage of 2G / kg (single), 3G / kg (and other stabilizer combination, with anhydrous). Used for the processing of cheese for 9g/kg (total phosphate, phosphate).

This product is acceptable as a calcium supplement for cookies, bread, etc., the amount of cereal flour for the 3G / kg, solid beverage was 20g / kg, calcium.