We hear about the benefits of milk from early childhood. It is used to prepare cereals for babies, dairy products, and cocoa. And throughout their lives, most people consume milk and milk products every day. Therefore, it is very important that all this is of high quality and safe.
Instructions
Step 1
Since milk is a perishable product, when making a purchase, first of all, you need to pay attention to its shelf life and storage conditions. You can buy only where there is special equipment for cooling, i.e. in shops, pharmacies, supermarkets, etc. But by no means on a market without refrigerators. The maximum transportation time without observing the temperature regime is 2 hours (this also applies to fresh milk). Also pay attention to the integrity of the packaging. It must not be violated.
Step 2
Of course, it is only possible to truly determine the quality of milk in laboratory conditions. For this, several GOSTs have been developed, according to which its physical (density), chemical (fat, protein, etc.) and biochemical (acidity, reductase test) indicators are checked.
Step 3
At home, you can check in several ways: 1. Pay attention to the color and consistency. If the milk is of high quality, then its color should be pure white without blotches of a different color, and the consistency should be thick and uniform. A liquid product with a bluish tinge means that it has been diluted with water. Density can be checked by dropping a drop on the nail. If it spreads right away, the milk has been diluted. 2. Taste. It should be slightly sweet. Too sweet means that the milk has already started to spoil and sugar has been added to it to hide the sour taste. In addition, manufacturers can add baking soda to increase shelf life, which is harmful to the stomach. You can feel it too. 3. See if the milk has froth. This is especially true for milk purchased from a household. If you pour it into a glass, and a light foam forms on the surface, then the milk is of high quality. Otherwise, we can conclude that it was diluted or passed through a centrifuge and skimmed. The beneficial properties are greatly reduced. 4. If you are really interested in milk quality, buy a litmus test. With its help, you can determine the presence of chemical impurities. The blue litmus test turns red, and the red one turns slightly blue if the product is not diluted. If there is a lot of alkali in milk, for example, from soda impurities, then the red piece of paper will turn blue. 5. Choose healthy milk. Of course, dairy products have a short shelf life. And the shorter it is, the better. If you buy an unprocessed product, you can see how much cream is formed on its surface. By buying from different sellers and comparing products, you will understand where it is more useful) When buying milk, always remember these tips and try to avoid low-quality products!
