graduated cylinder (hydrometer is not in contact with the tubular wall)

Teach you to quickly identify various spiked against the knowledge of milk: milk, healthy milk watered milk identify milk watered identification of milk. According to the principle of the density of the liquid, the normal proportion of the milk at 20 ℃ between 1.028 to 1.033, while when water was added. Vdb167, watered milk identification. According to the principle of the density of the liquid, the normal proportion of the milk at 20 ℃ between 1.028 to 1.033, while when water was added, the proportion of the milk will be reduced. Experiments show that when the milk each added 10% water Timberland Men's Cupsole 2 Eye Shoes, the proportion will be reduced to 0.0029 so we can use the pycnometry method identifies watered milk. The specific method is to 200ml mixing milk volume was slowly poured into 500 ml graduated cylinder, 20 ℃ hydrometer placed in a graduated cylinder (hydrometer is not in contact with the tubular wall). Stand for about 2 minutes to read the values, if the value is lower than 1.028, we can conclude that the milk is watered milk. Health literacy Second, mixed with soy milk milk identification. Take milk 10ml into 25ml test tube, add 0.5ml of iodine solution, after shaking back its color liquid orange yellow, the milk is normal milk; liquid rendered gray green can be judged milk mixed with soy milk. The principle is the soy milk and milk compared to almost no starch, but it contains a lot of carbohydrates, and carbohydrates in the case of iodine, usually you will be presented with a gray-green reaction. 3721 Health Network, mixed with starch milk identification. Taken milk 10ml into a 25ml test tube, heated to boiling, and after cooling add 2ml iodine solution shake. If so, the blue-violet precipitate milk mixed with starch. The principle is gelatinized starch with iodine to change the characteristics of the blue-purple. Health literacy doped alkali milk identification. Milk under the action of microorganisms, very prone to rancidity, to mask rancidity phenomenon, some unscrupulous operators will add a certain amount of milk used food base. Identifying such doped alkali milk method is to take the milk 10ml was placed into a 25 ml test tube Michael Kors Jet Set Tote Handbags Cheap, and then add 0.05% Rose red acid ethanol solution of 5ml, after shaking for color observation. If the roses red milk manipulation plus a food base michael kors cheap outlet, and the darker the color that alkalinity the greater. If the normal milk, the color should be orange. Teach you quickly identify the various mix against the milk