1, common fruit health problems
Watermelon: Swelling agents promote the use of ripening agents, swelling agents and highly toxic pesticides. The stripes on the skin of this watermelon are uneven. After cutting, the flesh of watermelon is fresh, and the melon seeds are white and smelly.
Mango: The surface of Huang Qing mango is covered with quicklime, which makes the skin look like that of Huang Chengcheng, but it doesn't taste like mango, and there is also the problem of excessive use of preservatives.
Pear: Growth promoter makes it precocious. It is precocious with swelling promoter, and then bleached and dyed with bleaching powder and colorant (lemon yellow). The treated pear juice is not so tasteless, sometimes accompanied by peculiar smell and rancid smell. This kind of poisonous pear has a short storage time and is easy to rot.
Persimmon: ripening with yeast raw persimmons are ripened with yeast or ripening agent, but the sweetness of persimmons is greatly reduced. There are also fruit farmers who ignite "test wine" when Tiba eats raw persimmons to make persimmons turn red. These chemicals will produce residues and make persimmons toxic.
Banana: Ripening with ammonia or sulfur dioxide. The skin of this banana is bright yellow and looks good, but its flesh is hard and not sweet. Sulfur dioxide causes damage to human nervous system, and also affects liver and kidney function.
Grapes: add ethylene to turn purple. Immature green grapes are soaked in ethephon diluent. In a day or two, the green grapes will turn into purple grapes. This kind of grape has uneven color, less sugar content, less juice and light taste, which is harmful to human body if eaten for a long time.
Peaches: Soak peaches with industrial citric acid. Soaking peaches with industrial citric acid makes them 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.
Jujube: chemical dyeing with boiling water, and then green jujube will turn red when soaked in boiling water. There are also fruit sellers who dye with chemical dyes and wax with industrial paraffin, which makes jujube toxic.
Litchi: Soak in sulfuric acid to change color, soak in sulfuric acid solution, or spray with ethephon water to make the discolored litchi bright red and attractive, but easy to rot. This solution has a strong acidity, which will make hands peel, mouth blister and burn the stomach. There are also fruit sellers who smoke with sulfur. Sulfur dioxide can cause strong irritation to eyes and throat, leading to dizziness, abdominal pain and diarrhea. Sulfur dioxide can also cause cancer.
Longan: spray sulfur to make it shine, spray sulfuric acid or acid solution to soak it to make it shine. Sulfuric acid is corrosive and will burn people's digestive tract. It is also easy to cause colds, diarrhea and severe cough.
Citrus: industrial paraffin polishing citrus fruits use preservatives excessively during storage, "beautify" with colorants during sales, and polish with industrial paraffin. The impurities in industrial paraffin wax contain heavy metals such as lead, mercury and arsenic, which will penetrate into the pulp after use, leading to memory loss and anemia.
Apple: Lycopene is used for coloring, swelling agent is used for coloring, and preservative is used for keeping fresh. Excessive use of dilators, erythropoietin and preservatives can harm the liver. Retailers will also wax apples with industrial paraffin wax to keep them moist and make the fruits bright and attractive.
2, fruit purchase skills
1. Apple:
Fuji should choose the one that looks a little yellow and crimson. This khaki, crisp, sweet, a little sour, tastes right. Never pick a little red in green. In this way, the taste will generally be lighter, and there may be a lot of water, but sweetness will definitely not work. The authentic red Fuji apple on the table is crooked, not straight, otherwise it is definitely not authentic. The color can't be particularly red, some are pink and not red. You should choose the one with more red lines, and the "navel" should be deep, so it is sweet. If there are many pockmarks on your skin, flick them with your fingers. They are crisp and echoing, sweet and crisp.
When buying apples (mainly red Fuji), it is best to choose the ones with striped red appearance (called "striped red"), and some yellow in the red. That kind of apple is crisp, juicy and sweet.
2. Watermelon, cantaloupe and melon:
When picking watermelon, I feel that the pattern of watermelon is open. The place where the tail blooms is very small, and the "navel" feels concave. The surface of these melons is not smooth, but uneven. Melons are greener and darker. When you hold them in one hand, pat them gently and listen to the sound, you should feel a little hollow. The hand you are holding has a slight trembling feeling. This watermelon is sandy, and it's not tight inside. If you are not familiar with it, it is a dead voice.
When choosing white melons, you should choose smaller ones. Most of the melons have no umbilical cord, but they are a little green. This is the first leaf of melon, so it is easier to pick because it is small. And the navel. The bigger the navel, the better. Press the soft part of the navel. Smell this melon's ass. Melon is a good and sweet melon.
When selecting cantaloupe, you should choose thick net lines and smell rich aroma.
When buying any melon, the end that is not connected with the seedling is concave, that is, ripe, good and sweet.
3. Oranges, grapefruit and oranges:
High orange, flat orange, naked orange. "Oranges should be tall, flat and shiny. If you pick oranges, regardless of the variety, there is a ring-shaped female in the middle, which is generally sweeter. There is a spotted male, which is not as sweet as a female. The skin is thin and elastic, the early orange juice is sweet, and the later oranges are rough and stringy. Pomelo, orange and orange should be picked up with heavy hands, and the skin should be as smooth as baby's skin and as rough as pockmarked face. But the popular sugar orange in winter has a rough and unsmooth skin. When buying oranges, you'd better buy the one with a circle at the bottom, that is, the "ass" one. Navel orange, just buy "ass". The hole is concave, sweet. Grapefruit and honey pomelo are generally as compact as possible. The same feel, the better. Press by hand, the harder the better, and the thinner the skin that cannot be pressed, the better. The smoother the peel, the more uniform and golden the color, the better. This kind of grapefruit has sufficient moisture, high sweetness and good taste.
4. Pear:
Pears should be female, delicate, juicy and sweet. Female, that is, the nest above should be uniform, with deep umbilicus, round umbilicus and thick roots.
5. Grapes:
Choose a whole bunch of full and dense grapes, smell them first, and then buy the ones with rich fruit flavor. When choosing grapes in winter, be sure to buy fresh ones. Don't look at the fruit, look at the stalks, fresh grapes, hard stalks and bright green. When the color becomes dark brown and soft, the picking time is longer. Although grapes look strong, they are actually the result of low-temperature preservation and are not really fresh. When buying "Rose" grapes, we should pay special attention to the fact that this small fruit is not easy to preserve.
6. bananas:
Don't choose two green bananas. They are processed and not too big. Small bananas are good, round and not angular. They are normal yellow with a hint of sesame color.
7. Kiwifruit:
When choosing kiwifruit, you must choose the one with a sharp head, like a chicken's mouth, rather than a flat mouth, like a duck's bill. The duck's mouth is made of hormones, while the chicken's mouth contains no hormones or little hormones. The whole fruit of the truly mature Miocene was super soft. When choosing, buy a slightly darker color, close to khaki skin, which is a symbol of sunshine and sweeter.
Kiwifruit is tender and green. This kind is fresh. The whole is soft and hard, and part of it is soft and rotten. The color around the joints is deep and sweet.
8. peaches:
The first thing to choose peaches is to smell the fragrance. The more fragrant, the sweeter. Usually looks not very good. Choose a peach, not too soft, with a small tip on it.
9. strawberries:
Don't buy strawberries that are too red. The brighter the color, the more sour they are. Strawberries with a little white in red are the sweetest. When buying strawberries, don't choose big ones with strange shapes. It's safer to choose a smaller one of the same size. Don't be particularly red, it's better to have a little white inside.
10. Papaya:
Papaya is also divided into male and female, and the older one is female, which is sweeter. Generally, the belly is bulging, there are many spots on the surface, and the color is only yellow, which is not very soft to the touch. If there is some chewing gum on the surface, it doesn't matter, it is sugar gum, which will be sweeter. If you want to eat papaya immediately, you should choose yellow skin, but not too soft, so that papaya will be sweet and not rotten. If you make papaya sparerib soup, you should buy green papaya that is not fully ripe. This kind of papaya is hard, of course, and is generally not eaten raw. When ripe, the peel is usually yellow and can be eaten as fruit. For dessert, you should buy red Hawaiian papaya, which is very sweet.
I believe that after understanding the above introduction, everyone is full of fear of fruit. In fact, there are not many such fruits, and mastering the skills of buying fruits can be avoided. So you need to carefully select which fruits look unusually bright. It is recommended to choose which ones are not so beautiful, but fresh, so as not to be harmful to the body after harmful treatment.