The author strolled around the major supermarkets and found that most supermarkets have opened up special imported food areas, and the flow of people is not too small. It is not difficult to see from the e-commerce platform that although imported products are higher in price, there are still a large number of consumers. Pay for quality. But have you ever thought that the quality of imported foods may be guaranteed not only because foreign manufacturers have a conscience?
According to statistics, in the first half of this year, Shanghai Customs granted 196 tons of a total of 900,000 US dollars of imported food 'not allowed to enter the country'. The imported foods include meat, dairy products, beverages, cakes and other more than 10 categories, mainly Because of the detection of microorganisms, excessive pollutants, and excessive food additives, the problem was rejected. Although the proportion of food in this part of the problem is not high, it can also indicate that the quality of imported food is representative, and there are guarantees behind it. Food testing equipment is silently escorted.
Whether the microbes in the food exceeds the standard is an important safety indicator for food. The number of microbes in food raw materials is too large, the operation and packaging process is not standardized, the sterilization is not complete, and improper storage and transportation may lead to excessive microbial food. It will exceed the human body's ability to withstand and affect the safety of the human body. Therefore, the equipment of the relevant testing equipment is extremely necessary. To accurately measure whether the microorganisms in the food exceed the standard, it is usually necessary to equip the laboratory with a sterilizing pot, a centrifuge, a water bath, and a drying oven. , homogenizer and other equipment. Taking the centrifuge as an example, the speed is the biggest difference between centrifuges. The centrifuge with slow rotation speed realizes solid-liquid precipitation. The ultra-centrifuge can realize density gradient zone separation or differential settlement separation. Thus, the microbes are completely separated for research.
There are many categories of food contaminants, such as those published by the Food and Agriculture Organization of the United Nations and the World Health Organization, which are not intended to be added to food, but are brought into food during production, manufacturing, processing, processing, filling, packaging, transportation and storage. Substances are called pollutants, and residual pesticides should also be considered as pollutants. Therefore, the detection of pollutants exceeding the standard is extremely broad. Taking pesticide residues as an example, as pesticide residues are valued by more and more people, pesticide residue related testing equipment The development of the rapid detection of pesticide residues is extremely attractive. It is reported that the rapid detection equipment for pesticide residues can give the test results within 15s, which greatly improves the efficiency of food detection.
Food additives have been demonized by the Chinese people. In fact, the proper use of food additives can bring more and more possibilities to food. However, if it exceeds the standard or violates regulations, it may have an impact on human health. Therefore, whether the food additives exceed the standard or violate regulations It is also used for testing. Because there are many types of food additives, the author uses sorbic acid as an example. Sorbic acid is a preservative. The United Nations, the World Health Organization, etc. all affirm their safety, but once the food additive exceeds the standard, There will always be a risk of bone growth, harm to the kidneys, and liver health. In the test, the additive in the food needs to be extracted first, and then the detection reagent is reacted with it to form a colored compound, and then the absorbance is measured by the detector to determine the Yamanashi Acid content.
In the era of trade globalization, food safety issues have also been extended to the global scale. Like last year, the Netherlands was blown out of eggs and was heavily contaminated with fipronil, and more than a dozen countries including Belgium, Germany, and France subsequently broke out. Poisonous eggs, even in Hong Kong, China, are also affected. In China, because the Dutch eggs are not allowed to enter, so as not to be affected. It is not difficult to see that no country's food can guarantee no problem at all. In this situation , also need food testing equipment manufacturers to increase product research and development investment, build a food safety fence.