Methionine methionine is an essential amino acid for livestock. DL-methionine is a white, light yellow crystalline or crystalline powder, with a special odor, slightly sweet, slightly soluble in water, easily soluble in dilute hydrochloric acid, sodium hydroxide solution, extremely difficult to dissolve in ethanol. Take a small amount and place it on a foil, and ignite it. Pure methionine should be burnt and burned, leaving no trace.
L-lysine (hydrochloride) L-lysine is one of the limiting amino acids in feed, and lysine must be added to the plant feed. L-Lysine is a light brown powder with a slight odor, is easily soluble in water and hardly soluble in alcohol and ether. The appearance of L-lysine salt is odorless. The ash content of L-lysine (hydrochloride) should be less than 0.3%, so that there is little residue after ignition.
Feed Yeast Feed Yeast is a microbial feed, rich in nutrients essential for the growth and development of livestock and poultry, especially rich in lysine, with strong vitality and high biological efficiency. The normal feed yeast is egg-white to brown powdery or fine particles with a special aroma of yeast; the adulterated yeast has a noticeable odor. Can also be checked by water washing: Take appropriate amount of yeast, add water repeatedly washing, observe the bottom of the residue, such as only low protein medium substances, and the content of the identified protein farther, this yeast is highly likely to adulteration . Feather powder, stone powder, cornmeal, bran and dyed pseudo-yeast were detected.
Due to its calcium and phosphorus ratio of 3:2, calcium hydrogen phosphate dihydrogen phosphate is close to the ratio of calcium and phosphorus needed for livestock and poultry, so it is used as calcium and phosphorus supplements in animal feed. Calcium phosphate is a gray or white powder or crystalline powder, odorless and tasteless, soluble in acid, almost insoluble in water, and insoluble in ethanol. The good product is almost completely dissolved in the hydrochloric acid solution, and adulterated calcium hydrogen phosphate plus hydrochloric acid will leave a large amount of insoluble matter at the bottom of the container.
Sub powder is a by-product of flour processing and is currently used as a carrier for premixes. The conditional user can use the method of measuring the sediment content of flour, and the breeder can make preliminary identification according to the specific gravity. The bulk density of secondary powder is below 1.5 g/ml, and the bulk density of minerals is generally above 2 g/ml. The adulterated secondary powder has a "pressing hand" feeling and is not commensurate with its volume. Water washing can also be identified.
Cakes and pancakes usually contain high protein and are of good quality. They are the essential source of protein for livestock and poultry. The adulterated rice cake is often detected in the microscope during the processing process. For example, the bean cake is mixed with grass flour, corn flour, etc. Peanut cake is mixed with peanut shells. It is also advisable to take the amount of baked pancake, put it in water, and dilute it with iodine solution to turn blue, then you can detect the non-stuffed raw materials that contain high starch content. After use, it will cause indigestion, diarrhea, and even poisoning of livestock and poultry. death.
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