Peaches are soaked in industrial citric acid, and they are bright red and not perishable. This chemical residue will damage the nervous system, induce allergic diseases and even cause cancer. Half-cooked crisp peach, adding alum, sweetener, alcohol, etc. Make it crisp and sweet. Alum is mainly composed of aluminum sulfate. Long-term consumption will lead to hyperosteogeny, memory loss, dementia, decreased skin elasticity and increased wrinkles. When white peaches are smoked with sulfur, there will be sulfur dioxide residue. How to identify: to identify the quality of peaches, we must first identify them according to the variety, place of origin and time of listing, and then carry out specific identification. Whether a peach has undergone a "chemical bath" mainly depends on its color. Generally speaking, mature peaches are yellow or pink, while immature peaches are light green. The pink color after soaking in industrial citric acid is extremely bright red. Ordinary peaches will start to rot in two or three days, and moldy soaked peaches will be very shiny in a few days.
Longan: Spray sulfuric acid to make it shine. Spray sulfuric acid or acid solution for soaking to make it bright. Sulfuric acid is corrosive and will burn people's digestive tract. It is also easy to cause colds, diarrhea and severe cough.
3. Banana: Ripening with ammonia or sulfur dioxide. The skin of this banana is bright yellow and looks good, but the pulp tastes hard and not sweet. Sulfur dioxide causes damage to human nervous system, and also affects liver and kidney function. How to identify bananas ripened by ethephon is common, but some unscrupulous merchants use chemicals such as sulfur dioxide and formaldehyde to ripen bananas, which requires certain identification skills: First, the ripened banana peel generally does not have the symbol of banana ripening-"plum blossom point", so when selecting bananas, bananas with "plum blossom point" are relatively safe; Secondly, bananas ripened with chemicals smell like chemicals; In addition, naturally ripe bananas are cooked evenly, not only the skin turns yellow, but also the middle is very soft; The middle of the ripe banana is hard.
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