Friends who often go to the supermarket to buy eggs may have noticed that many egg cartons will be marked with AA, A egg levels, what is the meaning of these letters? How can we identify the "bad guys" quickly?
What does a good egg look like?
According to GB/T 39438-2020 "Packaged Eggs", egg quality can be divided into three grades: special grade, first grade and second grade. Extra Grade eggs are the best in terms of freshness.
Crack a fresh egg, should clearly show three parts: concentrated protein, dilute egg white, and egg yolk. The fresher the egg, the clearer the thick egg white.
Sometimes there are small red dots or small pimples in the eggs. This is a flesh spot and a blood spot, which is allowed by the standard, but the size cannot be exceeded
According to the mixing ratio of different grades of eggs, GB/T 39438-2020 divides packaged eggs into AA grade, A grade and B grade. Among them, AA grade boxed eggs should have at least 90% extra grade eggs and no secondary eggs.
GB/T 39438—2020 grade requirements for packaged eggs
Fresh eggs are so picky
The quality, nutritional value and freshness of eggs are closely related, even AA grade packaged eggs, after a long time, they will become A quality or B grade. Therefore, when consumers buy eggs, they should not only pay attention to the level label, but also pay special attention to the production date of the product. In addition, there are some tips to help you see eggs.
Touch it
If the egg is too smooth to the touch, it means that the eggshell membrane has "disappeared" and the freshness has decreased significantly. We can also weigh the weight of the egg, the same size of egg, the feel of the heavy means that the water evaporates less and is fresher.
See through the light
Inside each eggshell is an empty space for unhatched chicks to breathe, called an air chamber. As the storage time is extended, the moisture and carbon dioxide in the egg continue to penetrate outward through the holes in the eggshell, and the air chamber continues to increase, and the position will also be shifted to the side of the egg.
When purchasing, we can point the egg at the light source and observe its air chamber.
The longer the time, the larger the air chamber
Put in the water
If you want to judge whether the eggs at home are still fresh, we can also use a bowl of water to test the buoyancy of the eggs, fresh eggs will sink to the bottom, the less fresh the egg, the higher the floating position.
11 days of eggs can sink horizontally, 53 days of eggs erected l my fearless kitchen
Place the egg in the middle of the water, the old egg is offset farther away than the old egg l my fearless kitchen
Give it a try, are your eggs still fresh?