Recently, Ms. Xu, a citizen, reported to the reporter that the green garlic she bought was "faded", and she could wipe out the blue juice with a gentle wipe of white paper. Let's take a look, what exactly are these blue substances?
Ms. Xu bought some green garlic at the vegetable market two days ago and went home to fry it, but when she got home, she carefully observed that there was a faint blue substance on the surface of the green garlic, and it could be wiped off by paper towels. Ms. Xu speculated that the merchant had dyed the garlic in order to keep it fresh.
Ms. Xu, a citizen, said: "When I go to the water, it will glow a faint blue, and I don't dare to eat it when I buy it, and I have never encountered this situation before." ”
Not only Ms. Xu, the reporter searched on the short video software and found that there are really many such cases, and citizens in Chongqing, Nanning, Guangzhou and other places have reported that green garlic vegetables have blue juice. Subsequently, the reporter visited several large farmers' markets in the city, but did not find any blue substance attached to the green garlic. However, some vegetable wholesalers said that they had indeed seen a blue substance attached to green garlic and shallots before, and most of them were some vegetables shipped from other places.
Ms. Zhang, a vegetable wholesaler, said: "They are all vegetables from other places, and those that have been seen are generally used to keep them fresh, and there is nothing to do." Just like we sometimes add ice cubes (to keep fresh), there will be that kind of substance in the ice, which is generally not available locally, and the local ones are dragged over the day before and sold the next day, so they don't need to be kept fresh. ”
Ms. Wu, a vegetable merchant, said: "Sometimes, there are those that specialize in treating insects, and the blue ones are all from other places, from Yunnan, Guizhou, or Shandong, but not locally." ”
So, what exactly is this "discolored green garlic"? Can it still be eaten normally? The reporter then sent the remaining green garlic from Ms. Xu's house to the Suqian Agricultural and Livestock Product Quality Inspection Center for on-site testing. The results showed that the blue substance on these "faded green garlic" was Bordeaux liquid, which was made of hydrated copper sulfate and quicklime mixture, and the staff introduced that this liquid is a broad-spectrum, cheap and safe fungicide and preservative widely used in agricultural production, and the bactericidal effect and "toxicity" mainly come from copper.
Chen Xiangyu, director of the office of Suqian Agricultural and Animal Product Quality Inspection Center, said: "This is a fungicide with a long history, it is only for bacteria and fungi produced by some pests and diseases on some crops, and it is also low toxicity to the human body, because copper ions are also a trace element in our human body, and zinc ions and manganese ions are the same, but if you eat too much, it must also be harmful." ”
Because Bordeaux liquid is water-soluble, it can be washed off by soaking and rinsing. In addition to Bordeaux liquor, there is also a substance - tetraacetaldehyde that may also adhere to some vegetables. Tetraacetaldehyde has a light blue appearance, softens when exposed to water, and is mainly used to eliminate mollusks such as snails, snails, slugs, etc., and has low toxicity to humans and animals. In addition, plants do not absorb tetraacetaldehyde and do not enrich it, so as long as the public cleans it normally, there is no need to worry too much.
Chen Xiangyu, director of the office of Suqian Agricultural and Livestock Product Quality Inspection Center, said: "Take some of the vegetables we bought back, in fact, running water cleaning is the best, if you are not at ease, you can put some baking soda, because baking soda is alkaline, it can neutralize some acidic pesticide residues, or some rice water, it is also alkaline, after washing we start to choose vegetables, in this way, to prevent it from seeping into the pesticide from the incision." ”
At the same time, in order to ensure the safety of the public, the Suqian Agricultural and Livestock Product Quality Inspection Center will carry out multiple supervision and spot checks on vegetables, eggs, livestock and poultry and other products every year, so that the public does not need to panic excessively.
Chen Xiangyu, director of the office of Suqian Agricultural and Animal Product Quality Inspection Center, said: "(Once) there are 108 samples of vegetables from three counties and five districts, and there are also 90 samples of livestock products, and in recent years, from our test results, our pass rate is more than 95%. Therefore, everyone can eat our agricultural products with confidence. ”