Customs destroyed and returned shipments

Business News Agency June 3 hearing: Customs destroyed and returned shipments More batches of “Blood Swallows” experts reminded the blood Yan that the color is very uniform and red, do not buy

Nitrite: Also known as industrial salt, it is also used as a food colorant and preservative in food production. However, it is very toxic. Excessive intake can cause poisoning and even death. Long-term consumption of food containing excessive nitrite will increase the risk of cancer.

The reporter learned from the Guangdong Inspection and Quarantine Bureau yesterday that the task team of the “Study on true and false identification methods for bird's nest and its products” undertaken by the Bureau has for the first time detected high concentrations of some of the so-called “blood swallows” and “yellow swallows” dyed nests. Nitrite, some of which even reaches several thousand milligrams per kilogram, is quite harmful to the human body! As a result, local Customs destroyed and returned shipments of "Blood Swallows".

Guangzhou City blood Yan also stained

According to reports, most of the dyed bird's nests seized were dyed with white bird's nests. “And in order to pursue higher profits, bad bird nests used by unscrupulous merchants are low-quality white bird nests with poor quality and good-looking appearance. The content of nitrite is very high, and some even reach several thousand mg/kg, which is very harmful to the human body.” However, it is not certain that it is directly stained with nitrite, or that chemical reactions occur during the dyeing process. of.

China's "Hygienic Standards for the Use of Food Additives" (GB2760-2007) severely restricts nitrite as a color-protecting agent for only a small amount of food such as meat, with a limit of 70 mg/kg. Other foods (including bird's nest) are not allowed to be added.

“The sales of blood swallows on the market in Guangzhou are indeed dyed by Bai Yan’s nest. Because the average price difference between Bai Yan’s nests and blood swallows reaches 1,000 to 2,000 yuan per kilogram,” said Wu Huihan, secretary general of the Guangzhou Dried Seafood Chamber of Commerce. If neighbors buy bird's nests, it is not recommended to buy blood swallows.

"5000 US dollars can learn bird's nest staining"

According to the experts of the inspection and quarantine system, the public is reminded to buy blood swallows. Be sure to be very vigilant with the color, which is very bright. The real blood swallows should be brown and have uneven colors. "Now the process of dyeing bird's nest is very advanced, and it will not fade. In Indonesia, we can learn bird's nest dyeing at $5,000."

According to reports, bird's nest is mainly produced in Indonesia and other Southeast Asian countries, and its annual output has reached several hundred tons. Mainland China has become the largest consumer of bird's nest with annual sales of tens of billions of dollars. However, compared with the booming bird's nest market, domestic and foreign related detection technologies lag behind market consumption. The lack of relevant evaluation methods, evaluation criteria, and detection methods has resulted in the uneven distribution of commercially available bird's nest products. Consumers find it difficult to distinguish the authenticity from the truth, and government regulators are unable to enforce the law.

The bird's nest identification method is the first in the country

The “Technology for the identification of bird's nest and its products,” the research project team of this science and technology project has detected high concentrations of nitrous acid in the dyed bird's nests of the so-called “blood swallows” and “yellow swallows” many times in the past year or two. Salt, and the results of the study were also first discovered by the research group in the country. According to the results, the inspection, quarantine and customs departments throughout the country destroyed and returned shipments of “Blood Swallows”.

According to reports, the method used to determine the use of spectrophotometry, liquid chromatography tandem mass spectrometry combined with molecular biology to identify true and false bird nests, can effectively distinguish between artificially added adulterants and naturally occurring nutrients, but also can be used for a large number of rapid sample Determination.

Bird nest common fake

Shoddy tricks

Dyeing: Difficult to sell the Yanyan blood Yan and Huang Yan;

Bleaching: Full or partial bleaching of dark brown or miscellaneous black bird nests with hydrogen peroxide;

Mixed with colloid: The flour, fish gelatin, pectin, pigskin gum, seaweed gum, white fungus gum, resin, etc. are mixed on the surface of the Yanyan, making it look bright and dense, increase the weight;

Sticking: Adding low-quality Maoyan, Caoyan, and Yan cakes to high quality bird nests increases weight.