What is artificial shark fin? How to identify?

Shark fins are mistaken for fans, no longer a network joke, but real real things.

Artificial shark's fin, that is, dried seafood silver silk, is processed by using sodium alginate and other edible chemical raw materials. The finished product is white, delicious, crisp, and tastes more like a fan. Production of artificial shark fins can be manually operated. The raw material ratio is: 500 grams of sodium alginate, 200 grams of gelatin, 25 to 35 kilograms of water, and the appropriate amount of salt and monosodium glutamate, and 50 grams of calcium chloride. The main production process is as follows:

First, the preparation of raw material liquid will be 25 kg of water boil and slowly poured into 500 grams of sodium alginate and stir; then use a small amount of water to boil 200 grams of edible gelatin dissolved in sodium alginate solution, while adding the right amount of salt and monosodium glutamate Uniform, ready-to-feed liquid. During stirring, care must be taken to stir in one direction, otherwise the raw material solution will blister, affecting the appearance and quality of the finished product.

Second, the preparation of calcium chloride solution 10 kg of warm water into the cylinder, add 50 grams of calcium chloride and stir to make it evenly dissolved.

Third, processing of finished products based on the thickness of the finished product needs, to take a moderate leakage of the colander, the raw material solution was slowly added to the colander, leaking from the leak into the cylinder containing food calcium chloride solution, until the raw material solution After leaking into the cylinder from the colander and solidifying into a silver thread, continue to soak in calcium chloride aqueous solution for 20-30 minutes to completely solidify the silver wire; then remove the silver wire from the calcium chloride aqueous solution and use clean water. Rinse several times, then put it in clean water and soak for 10 hours. If you need to store and transport, you should also dry and do quantitative packing.

Shark fins are made of shark fins. In many high-end restaurants, shark fins are frequently costing several hundred yuan or even thousands of yuan. However, insiders say that about 40% of the shark fins consumed in the domestic market rely on this type of shark fin. The so-called artificial shark fins have already formed a black interest chain. These shark's fins are prepared from synthesis and preparation of shark's fin, followed by caustic soda gelatin hydrofluoric acid, containing a large amount of substances that damage the human digestive system and cause cancer. Recently, CCTV reporters' investigations have restored the process of fake shark fins.

Shark fins detected heavy metal cadmium exceeded

According to the Zhejiang Industry and Commerce Department, it was found that a small bowl of shark's fin raw material costing hundreds of yuan was actually made by a few bucks and a large pack of fans. In the fishery market, one-third of dried fins exceeded the standard, and the most serious one exceeded 10 times; The Shark's Fin in 10 hotels checked the "DNA" and found no sharks.

Excessive cadmium can damage human liver and kidney

The reporter learned that cadmium chronic poisoning is most likely to damage kidney function and can also damage liver function. Almost all of the chronic diseases that are currently high in China, such as hypertension, chronic obstructive pulmonary disease, diabetes, anemia, osteoporosis, and tumors, may be related to excessive levels of cadmium in food.

"Fish shark's fin" ingredients labeled gelatin

Don’t think that shark fins are just a joke for fans. This has become a big “industry”.

The person in charge of the Provincial Consumer Protection Committee stated that the “supreme shark's fin” (artificial synthetic shark's fin) packaged in plastic bags on the market is very common, and there is a golden brown dry “fan” that sells in the market. It only costs tens of pounds. On the outer packaging, the "fin of shark fins" is called "synthetic wing pin" and the ingredients are edible gelatin, sodium alginate, etc.

However, after this tens of yuan of artificial synthetic shark fins was purchased by the hotel, they changed hands and became “high-end dishes” such as a shark fin feast on the table or the Buddha Jumping Wall. This time, when the Consumer Protection Committee purchased a 40 cm-long, ultra-white-colored dental picking wing inspection agency from the Hangzhou Aquatic Products Market, it found that a large amount of viscous gelatin was spilled and no trace of shark composition was detected. Does not meet the characteristics of natural shark fins.

Test experts analyzed that "the shark's fin may be made of artificial lamination with gelatin and other materials."

Deceptively --- "combined fans" counterfeit shark's fin

What is the fake shark fin in the end? According to a vice chairman of the Guangzhou Dried Seafood Industry Association, the key is the selection of restaurants. For example, a bag of “flavored vermicelli” weighing 500 grams—the industry’s “fat shark's fins” costs only about 20 yuan, but it can cook shark's fin soup for more than a dozen people, with an average bowl of “shark fin”. The cost of soup is only one or two yuan.

According to industry insiders, most restaurants generally use dental picking wings. The wholesale price for each catty ranges from RMB 300 to RMB 500. After professional cooking and counting the costs of artificial and seasoning, the cost of a bowl of genuine shark's fin soup costs around RMB 50. The sales price is at least 150 yuan.

It is understood that fake shark's fins are also divided into high, medium and low grades. The better ones are processed from the cartilage of fish like the boss fish and Jiaji fish. The price per kilogram is between 90 yuan and 180 yuan. Is the synthesis of starch, agar and gelatin, the price per catty is between 50-70 yuan; there is a kind of cheapest "frozen wings", only 40 yuan per catty, can be boiled directly into the water, most people can not eat it .

How expensive is the real shark fin? Wu Huihan, deputy chairman and secretary-general of Guangzhou Dried Seafood Industry Chamber of Commerce, said that at present, the price of pure shark fins is between 300 yuan and 1,000 yuan per catty.

Shoddy--carcinogenic bleached shark fin

In addition to the selection of the restaurant to be real, another chaos is to shoddy, or even direct production and sale of counterfeit shark's fin products. In April of this year, Qingyuan City investigated and prosecuted a fake den of dried aquatic products such as shark's fin and flower lacquer. It faked 23.5 kg of finished shark fin and used non-edible hydrogen peroxide (commonly known as “hydrogen peroxide”) solution for a long time. soak.

"After some shark fins in the market are soaked with hydrogen peroxide, the smell of the shark's fins will be removed. Following this, according to physical habits, the hydrogen peroxide will be volatile. After processing, the shark's wings will be dried and the hydrogen peroxide will evaporate." Wu Huihan told the Yangcheng Evening News reporter Currently, various types of shark fins sold at Guangzhou's Yide Road have previously been concerned about sulphur dioxide, heavy metal arsenic, mercury and other residues, and hydrogen peroxide has not been included in the scope of inspection by the Bureau of Quality Supervision.

After the “Hydrogen peroxide bubble shark fins” incident occurred, last month, six batches of shark fins on Yide Road were sampled by the Guangzhou Quality Supervision, Inspection and Research Institute. All product items met the requirements and no hydrogen peroxide residues were found.

Missing standards

At present, there are no national standards for shark fin and other high-end seafood products, and there are no professional certification agencies. Therefore, the relevant functional departments can only investigate and punish those products that have no production date or name or site, or clean up some underground counterfeiting dens. However, it is difficult to manage the illegal sale of synthetic shark fin by the unscrupulous traders and restaurants and hotels.

According to industry insiders, the proliferation of shark fin falsification is driven by huge profits. The gaps in detection methods also make counterfeiters fearless.

Sharp decline in sales

According to Lin Dinggui, head of the Ecological Protection Committee of the Hong Kong Chamber of Commerce for the Import and Export of Seafood, Hong Kong has about 10,000 people engaged in the shark fin trade industry. “Now it's getting harder and harder for business, and many people have turned around.”

In the analysis of the industry, in addition to the lack of integrity caused by the chaos in the shark fin industry, the anti-feeding and boycotting of shark fin action by celebrities, social celebrities, and civil environmentalists is also considered to have affected the sales of shark fins to some extent.

How to distinguish between true and false shark fins?

1. If there is no fake shark's fin made into dishes, there is no strong smell of fish.

2, fake shark's fin is not as transparent as real shark's fin, dry fake shark's fin is often a bit turbid, yellowish.

3. After all, fake shark fins that have not been soaked are made from industrial glue. After comparing with real shark fins, they can be easily cut off by hand. Real shark fins usually only bend and do not break.

4, fake shark fins are not fire-resistant, although it looks very rough, but easy to soften after cooking, eating less elastic than real shark fins, real shark fin is refreshing and flexible.

5. The viscosity of fake shark's fin is not as strong as shark's fin. For example, shark's fin with rice, fake shark's fin to do after the hand-wrap, it is easy to have rice off, while the real shark fin is more viscous, sticky rice on the top is not easy to fall off.

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