Preserved eggs are usually made of soda ash, limestone, saline alkali, lead oxide, plant ash and other substances, and treated with soda ash, lime and lead oxide. Preserved eggs are made of quicklime, soda ash, saline alkali and lead oxide, which may contain heavy metals such as lead and zinc. Preserved eggs and preserved eggs belong to different substances, and their appearance and composition are different, so they are different.

Preserved eggs, also known as preserved eggs, are made by wrapping duck eggs with alkaline substances such as eggs or quicklime and salt through a series of processes. Preserved eggs are made of soda ash, limestone, saline alkali and lead oxide. Preserved eggs Preserved eggs belong to processed food, so we should pay attention to the freshness of the purchase and avoid buying polluted and deteriorated preserved eggs.

Types of preserved eggs

1, lead-free preserved eggs

Lead oxide is added to the traditional preserved egg processing formula in China. As lead is a toxic heavy metal element, some countries have banned its sale, which has affected the export of preserved eggs in China. Therefore, the relevant scientific research departments have studied the substitute substances of lead oxide, among which EDTA and FWD have better effects. When EDTA (ethylenediamine tetraacetic acid) is used, the formula and processing technology of other auxiliary materials remain unchanged, as long as lead oxide is removed and EDTA is used instead.

2, colorful preserved eggs

The main raw materials are fresh duck eggs, white lime, secondary tea, salt, flour alkali, yellow lead powder, plant ash, loess and rice husk. Equipment, utensils, cylinders, basins, etc. The preparation method comprises weighing 25g of tea,100g of salt,165g of surface alkali, 400g of lime,10g of yellow lead powder, 300g of plant ash,1500g of loess and 2,500g of rice husk. First, pour 1500g hot water into a vat, put the tea leaves, salt, flour alkali and plumbum preparatium powder into the vat and stir them evenly, then put the sieved white lime, loess and plant ash into the vat and stir them evenly to form slurry.

The above contents refer to Baidu Encyclopedia-Preserved Eggs.