water soluble method

Take a small amount of sample, put it into a clean glass cup or burner, add 10 times the volume of water, stir vigorously, and observe the float on the water surface and the sediment water at the bottom after standing. If feather fragments or plant matter such as rice husk meal, peanut hull meal, wheat bran, etc. are floating on the surface, and sand, gravel and minerals are found on the bottom, hydrolyzed feather meal or plant adulterant is mixed together.

Sieving method

Sieve the fishmeal sample with a standard sieve with an aperture of 2.80mm. At least 98% of the standard fishmeal pellets pass. Otherwise, the fish meal is adulterated. Use sieves of different mesh numbers to detect mixed impurities.

Odor Test Method

The authenticity of fish meal can be judged by the smell produced when the sample is burned. When burning, if you smell the smell of pure wool after burning, it means that it is an animal adulteration material; if you smell the aroma when the grain is dry-frying, it means that the fish meal is mixed with vegetable substances; take 20g sample into a small flask or In the conical flask, add 10g soybean flour and appropriate amount of water, cover and heat for 15-20min. After removing the stopper, you can smell a smell of ammonia, indicating that the urea is mixed.

Odor Test Method

The authenticity of fish meal can be judged by the smell produced when the sample is burned. When burning, if you smell the smell of pure wool after burning, it means that it is an animal adulteration material; if you smell the aroma when the grain is dry-frying, it means that the fish meal is mixed with vegetable substances; take 20g sample into a small flask or In the conical flask, add 10g soybean flour and appropriate amount of water, cover and heat for 15-20min. After removing the stopper, you can smell a smell of ammonia, indicating that the urea is mixed.

If you have any questions, you can come to Sunshine Industry