The researchers measured more than 1,200 plastic particles per pound of sea salt, and Zhao Yi, deputy director of the National Salt Products Quality Supervision and Inspection Center, said that the diameter of plastic particles in the ocean ranged from 10 microns to 5 millimeters. In the report, there is no indication of the extent of plastic particles in the range of particle size, nor does it indicate the method used to detect the amount of plastic particles. It is not known whether the test method is internationally recognized and whether the selected sample is representative. There is a rigorous attitude towards scientific research." "The salt production process is a crystallization process, and the crystallization method is the best procedure for purification. It is impossible to contain any other impurities in the crystal of the salt, and even other magnesium ions cannot crystallize to the salt. On the crystal. At the same time, in the salt production process, there are centrifugal technology and cleaning technology. These plastic particles have nowhere to exist. If plastic particles are moved in the packaging, all the products used in plastic packaging may exist. This problem. This report is not enough to understand the production process of salt." A salt industry expert told this newspaper. "In the production process of Chinese sea salt, only the black plastic film of polyvinyl chloride is used for covering. If the film is broken, there will be black objects visible in the form of flakes and strips, which are impossible to exist in the form of particles. After the sea salt is crystallized, it is washed and pulverized. Even if there are impurities, it is washed away in these processes. If it is a mine salt, it is usually a salt mine located 800 to 3,000 meters underground, one well is injected with fresh water, and another well The brine is extracted and then purified to eliminate calcium and magnesium ions, because calcium and magnesium are easy to form scale damage to the machine, and then evaporated to form a salt slurry, which is then dried and packaged after centrifugation. There is no possibility of plastic components in the whole process." . Zhao Yi said that it is obvious that these researchers have no knowledge of China's sea salt production process. In the northern sea salt production area of ​​China, about one ton of bitter brine is needed to produce one ton of sea salt, and most of the pollutants are discharged with bitter brine. These bitter brines are used in the production of salt chemical products industrial potassium chloride, industrial bromine and industrial magnesium chloride. The edible salt produced by sea salt is further purified by vacuum evaporation or pulverization, washing, drying and the like. Dong Yongsheng, deputy general manager of China National Salt Corporation, said: "The safety of salt in China can be guaranteed. If the environment is polluted, the pollution has been removed to the greatest extent in the salt production process."
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Sea salt contains plastic particles? The safety of Chinese salt is guaranteed
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