Quick Identification Method of Commonly Used Feed Additives

Online, June 21, 2013 (Newswire.com) - To the choline chloride feed additives are added various small or trace substance for animal health. Small amount of choline chloride feed additives have a significant effect. The feed additive is inevitable to use as a raw material for modern feed industry. Feed additives are divided into nutritional additives and non-nutritive additives.

Nutritional additives

Amino acid additives: Adding amino acids to feed can improve the fertility and viability for poultry.

Supplements of Trace elements are needed for animals Trace elements can improve animal's immune function, in order to prevent the emergence of disease.

Vitamins additives: They can promote animals' metabolism, Growth and reproduction.

Non-nutritive additives

Include: Anthelmintic, Probiotics, Enzyme preparation, Feed preservatives, etc. These additives are not the inherent ingredients in feed. It can be said that these additives have a certain function, they can improve the efficiency of feed, meet the special needs of the animal.

Methods of identification

1. Vitamin A
Vitamin A additives look like the light brown or greyish yellow particles. Take 0.1 g of sample, wet and grind it with ethanol to make it dissolved，plus 0.5 ml of chloroform solution. If the Vitamin A is pure, the solution will appear blue in the beginning and then fade immediately.

2. Vitamin E
Vitamin E additives look like the light brown or greyish yellow particles. Take 15 mg of sample, add 10 ml of anhydrous ethanol to dissolve the sample, Add 2 ml of nitric acid, after redistributing, heating for 15 minutes. If it is pure, the solution will be orange-red

3. Sodium Selenite
Sodium selenite looks as white powder. Take 0.5 g of sample, shake and filter after adding 30 drops of ethanol, add 5 drops of nitric acid in the filtrate. The filtrate will turns red after heating.

4. Vitamin K3
Vitamin K3 looks as white or gray-yellow-brown crystalline powder. Take 0.1 g of sample, add 10 ml of water dissolved, add 3 ml of sodium carbonate to the water dissolved. At last, the bright yellow precipitate will be formed in the solution.

5. Vitamin B1
Vitamin B1 looks as white crystal or crystalline powder with slight odor and slightly bitter taste. Take 0.1 g of sample, shake and filter, add 3 drops of iodized reagent in the filtrate. The brown-red precipitate will be formed in the filtrate.

6. Vitamin B2
Vitamin B2 looks as yellow or orange yellow crystalline powder with bitter smelly odor. Take 0.5 g of sample, dissolve it with a small amount of water, extract the supernatant, add two drops of dilute hydrochloric acid solution or sodium hydroxide solution. Finally, the yellow fluorescent in the liquid will disappear.

7. Ferrous sulfate
Take 0.1 g of sample, dissolved the sample in 10 ml of water, add 2 to 3 drops of 10% potassium chloride solution to generate dark blue precipitate，then add a few drops of dilute hydrochloric acid. The pure's precipitate will be difficult to dissolve.

8. Magnesium sulfate
Take 1 g of sample, dissolved it in 10 ml of water, add a few drops of 5% disodium hydrogen phosphate solution, the white precipitate will be formed. Finally, add ammonia, insoluble precipitate can prove the purity of sample.

The last summary: If we can disseminate these identification methods in the world, the production of choline chloride feed additives will be more standardized.