The favorite mutton in the hot pot, the buns that can be eaten in one turn of the microwave oven... The frozen food not only allows us to enjoy the delicious food, but more importantly, we don't have to go into the complicated kitchen work before enjoying the delicious food. When quick-frozen foods occupy an important position in large-scale supermarkets, when more and more frozen foods enter modern households, as consumers, do you really understand frozen foods and choose frozen foods? This week's “Weekly Quality Lecture Hall†and Zhu Xiaojun, an engineer from the Provincial Quality Inspection Institute, will fill this lesson for you.
Can low temperatures kill bacteria? Often encountered in the detection of "bacterial door"
What is frozen food? Simply put, it is a kind of low-temperature food that fresh raw materials are rapidly processed after being properly processed or processed, and then sold under a continuous low temperature of -18°C and then thawed or cooked. Based on this understanding, many consumers will think that frozen foods in a low-temperature environment are safe, but can the facts be? Zhu Xiaojun told reporters that from the previous inspections, the main cause of unqualified frozen foods was the problem of excessive microorganisms. According to the processing technology and quality requirements of frozen foods, all aspects of frozen foods from production to sales must be at low temperatures. In any case, the negligence will affect product quality.
The more "frozen" the more fresh? Do you want to buy frozen foods? If frozen foods need to be in the cold chain environment, then is it more reliable to look at the quality of frozen foods that are "frozen"? Prof. Zhu Xiaojun A simple and practical tip for the consumer: Frosting inside the bag is an important criterion for judging product freshness. If the crystallized cream on the bag is shiny and the food itself freezes hard, the frozen food is well preserved. If the inside of the package is heavily frosted, or if the surface of the frozen food is excessively whitened, then the “cold chain†of the product has been broken, which not only compromises the freshness but also the quality of the product itself.
Bulk frozen food is very affordable? Easier secondary pollution Compared with the quick-frozen food packaged with the stereotyped packaging, bulk frozen foods are popular with many consumers because of their economic benefits. However, it needs to be reminded that these "frozen" sales of frozen foods because there is no uniform packaging bags, consumers often can not clearly know the production date and shelf life when purchasing, this will leave hidden dangers to consumer safety. In addition, due to being exposed, consumers are inevitably causing secondary pollution when purchasing and picking. Therefore, it is advisable to purchase bulk frozen foods carefully.
Hot water thawing fast? Although it is good to slowly thaw the most reliable quick-frozen food, it is also very important to correct the treatment before eating. If the frozen food is thawed unreasonably, it will also result in the loss of nutrients. It is reported that after the food freezes, the volume expansion rate can reach 9%, and the gas expansion rate is greater. Therefore, when melting frozen foods, it is advisable to melt them slowly or slowly, or to move from the freezer of the refrigerator to the cold room in advance. Can be placed at room temperature to thaw naturally, otherwise it will cause loss of juice. Some people like to soak in hot water or wash and thaw, although the time spent is short, but the temperature rises rapidly, the food melted water is too late to be absorbed, the juice leaks along with the water, nutrients are also lost. There is also a microwave heating and thawing, although the time is shorter than the hot water brewing, but the heat is not introduced from the outside, but is produced at the same time inside and outside the food, so the original structure and shape can still be maintained after thawing. The loss is not much. However, we must pay attention to flip food in time in order to avoid excessive local heating.
■Reminder for Consumption 1. Normal frozen foods are required to be kept in an environment below -18°C. If the freezing temperature of a freezer or freezer in a sales shop does not reach -18°C, the product quality cannot be guaranteed and it should not be purchased.
2, pay attention to product packaging. The bag must be sealed and the product inside the bag is non-adhesive without damage or deformation. There should be no or only a small amount of ice chips in the bag. If there is more ice stains in the bag, it may be caused by freezing of the product and freezing. Try not to buy foods that have been frozen or thawed and frozen. The quality of this frozen food may have been affected.
3, please take frozen food at the end of purchase. If you can not immediately eat, it is best to go into the freezer of the refrigerator as soon as possible after returning home, so as not to leave the cold chain too long, affecting product quality.
Can low temperatures kill bacteria? Often encountered in the detection of "bacterial door"
What is frozen food? Simply put, it is a kind of low-temperature food that fresh raw materials are rapidly processed after being properly processed or processed, and then sold under a continuous low temperature of -18°C and then thawed or cooked. Based on this understanding, many consumers will think that frozen foods in a low-temperature environment are safe, but can the facts be? Zhu Xiaojun told reporters that from the previous inspections, the main cause of unqualified frozen foods was the problem of excessive microorganisms. According to the processing technology and quality requirements of frozen foods, all aspects of frozen foods from production to sales must be at low temperatures. In any case, the negligence will affect product quality.
The more "frozen" the more fresh? Do you want to buy frozen foods? If frozen foods need to be in the cold chain environment, then is it more reliable to look at the quality of frozen foods that are "frozen"? Prof. Zhu Xiaojun A simple and practical tip for the consumer: Frosting inside the bag is an important criterion for judging product freshness. If the crystallized cream on the bag is shiny and the food itself freezes hard, the frozen food is well preserved. If the inside of the package is heavily frosted, or if the surface of the frozen food is excessively whitened, then the “cold chain†of the product has been broken, which not only compromises the freshness but also the quality of the product itself.
Bulk frozen food is very affordable? Easier secondary pollution Compared with the quick-frozen food packaged with the stereotyped packaging, bulk frozen foods are popular with many consumers because of their economic benefits. However, it needs to be reminded that these "frozen" sales of frozen foods because there is no uniform packaging bags, consumers often can not clearly know the production date and shelf life when purchasing, this will leave hidden dangers to consumer safety. In addition, due to being exposed, consumers are inevitably causing secondary pollution when purchasing and picking. Therefore, it is advisable to purchase bulk frozen foods carefully.
Hot water thawing fast? Although it is good to slowly thaw the most reliable quick-frozen food, it is also very important to correct the treatment before eating. If the frozen food is thawed unreasonably, it will also result in the loss of nutrients. It is reported that after the food freezes, the volume expansion rate can reach 9%, and the gas expansion rate is greater. Therefore, when melting frozen foods, it is advisable to melt them slowly or slowly, or to move from the freezer of the refrigerator to the cold room in advance. Can be placed at room temperature to thaw naturally, otherwise it will cause loss of juice. Some people like to soak in hot water or wash and thaw, although the time spent is short, but the temperature rises rapidly, the food melted water is too late to be absorbed, the juice leaks along with the water, nutrients are also lost. There is also a microwave heating and thawing, although the time is shorter than the hot water brewing, but the heat is not introduced from the outside, but is produced at the same time inside and outside the food, so the original structure and shape can still be maintained after thawing. The loss is not much. However, we must pay attention to flip food in time in order to avoid excessive local heating.
■Reminder for Consumption 1. Normal frozen foods are required to be kept in an environment below -18°C. If the freezing temperature of a freezer or freezer in a sales shop does not reach -18°C, the product quality cannot be guaranteed and it should not be purchased.
2, pay attention to product packaging. The bag must be sealed and the product inside the bag is non-adhesive without damage or deformation. There should be no or only a small amount of ice chips in the bag. If there is more ice stains in the bag, it may be caused by freezing of the product and freezing. Try not to buy foods that have been frozen or thawed and frozen. The quality of this frozen food may have been affected.
3, please take frozen food at the end of purchase. If you can not immediately eat, it is best to go into the freezer of the refrigerator as soon as possible after returning home, so as not to leave the cold chain too long, affecting product quality.
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