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17
2013
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06
Problems related to the use of copper sulfate in the processing of preserved eggs
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1. Pied eggs are a great invention of the Chinese people: making fresh duck eggs into preserved eggs is a great invention of the Chinese people. It has a history of more than 1000 years and is a wonderful diet of the Chinese nation. The entrance of preserved eggs is smooth, mellow and long aftertaste, which is deeply loved by people.
1. Pied eggs are a great invention of the Chinese people: making fresh duck eggs into preserved eggs is a great invention of the Chinese people. It has a history of more than 1000 years and is a wonderful diet of the Chinese nation. The entrance of preserved eggs is smooth, mellow and long aftertaste, which is deeply loved by people.
2. Nutritional effects of preserved eggs: After fresh duck eggs are marinated into preserved eggs, the cholesterol content drops by more than 20%, protein and lipids are decomposed, and they are more easily absorbed by the human body; copper, zinc, iron and other minerals are rich. Traditional Chinese medicine believes that preserved eggs have the effects of cooling, eyesight, and liver. They can also reduce fire, blood pressure, lipid, hangover and appetizer, increase appetite, help digestion, and nourish the body. Classic preserved egg dishes include lean meat porridge, preserved egg mixed with tofu, preserved egg fillet soup, etc.
3, with copper instead of lead (that is, lead-free preserved egg technology) is a great progress in preserved egg technology: before the processing of preserved eggs with lead oxide as processing accessories, lead safety range is relatively narrow, easy to endanger human health. In 1983, Hubei Commodity Inspection Bureau used copper sulfate instead of lead oxide to produce preserved eggs, realizing the industrial production of lead-free preserved eggs for the first time.
4. What kind of copper sulfate can be used for preserved egg processing? According to GB 2760-2011 National Food Safety Standard, Standard for the Use of Food Additives, copper sulfate can be used as a processing aid for preserved egg processing. Food additive grade copper sulfate must be used for processing preserved eggs.
Is there a standard for food additive copper sulfate? There are national standards. GB 29210-2012 National Food Safety Standard Food Additive Copper Sulfate. Different from industrial grade copper sulfate, there are strict restrictions on the purity of copper sulfate, no precipitation of hydrogen sulfide, iron, lead and arsenic.
6. What aspects are food-grade copper sulfate eggs suitable for: ① added to milk powder as a nutritional fortifier; ② added to wine as a clarifying agent; ③ used as an auxiliary agent for preserved egg processing technology.
7. Decisive factors of the length of preserved egg pickling period: The length of preserved egg pickling period mainly depends on the concentration of alkaline substances in pickling preparations. The higher the concentration, the shorter the period and the lower the concentration, the longer the period. In addition, the pickling temperature is also an important factor, in the appropriate temperature range, the higher the temperature, the shorter the pickling time. The pickling cycle of loose heart preserved eggs is about 40 days, and the pickling cycle of sand heart preserved eggs is about 60 days.
8. The role of food-grade copper sulfate in the processing of preserved eggs: The role of food additives in the processing of preserved eggs is to block the egg holes. The process of processing fresh eggs into preserved eggs is amazing. The fresh eggs are soaked in alkaline solution, and the alkali solution continuously penetrates into the eggshell through the egg holes. The yolk and egg white become liquid and gel. At this time, copper ions block the egg holes like plugs, so that the alkali solution no longer penetrates into the egg, otherwise the solidified protein will liquefy again causing "alkali injury to the egg".
9. Why is there no copper sulfate in the packaging ingredients list of preserved egg products? It is legal that there is no acid copper on the preserved egg packaging. GB7718-2010 to the "General Rules for the Labeling of Prepackaged Foods of National Food Safety Standards", processing aids do not need to be marked in the ingredient list. The food additive copper sulfate used in the processing of preserved eggs is used as a processing aid rather than an ingredient, so it does not need to be included.
The price of industrial copper sulfate is about 1/3 of that of food additive grade copper sulfate. In order to reduce costs, some bad manufacturers illegally replace food grade copper sulfate with industrial copper sulfate.
The difference between industrial copper sulfate and food copper sulfate: industrial copper sulfate often contains lead, arsenic, cadmium and other toxic and harmful elements, so it can not be used in food processing. Food grade copper sulfate in the process of refining those toxic and harmful elements have been removed, is safe. Those manufacturers who illegally use industrial copper sulfate to process preserved eggs due to cost and other reasons should be punished according to law.
12. Why do enterprises producing food additive grade copper sulfate fail to apply for food additive production license: according to the detailed rules for the implementation of replacement (issuance) of food additive production license, the food additives currently subject to production license management are divided into 19 units and 169 varieties, while copper sulfate is not included in the 169 varieties and is not included in the scope of license issuance.
13. Large enterprises and most enterprises in the industry are using food-grade copper sulfate: since the advent of lead-free technology for preserved eggs, the whole industry is basically using copper sulfate as a processing aid for preserved eggs. Due to the enhancement of quality awareness and the joint efforts of the industry, most preserved egg processing enterprises are using copper sulfate that meets the standards of food additives, especially several large enterprises in the industry have played a good exemplary role.
14. How to consume preserved eggs with confidence: because the naked eye cannot distinguish whether industrial copper sulfate or food grade copper sulfate is used in preserved eggs processing. The best way is to go to the regular supermarket to buy regular manufacturers of brand products.
15. What grade of copper sulfate is used by Shendan Company to make preserved eggs: Shendan Company has always used food grade copper sulfate for processing preserved eggs. Food grade copper sulfate this year began to have a national standard, before we are in accordance with the food copper sulfate enterprise standards. The state encourages enterprises to formulate and implement enterprise standards that are higher than the national standards. The corporate standards we have been implementing are higher than the national standards now promulgated.
Problems related to the use of copper sulfate in the processing of preserved eggs
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Hubei Shendan Health Food Co., Ltd.
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