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On July 20, the Guangzhou City Administration for Industry and Commerce announced on the official website the results of the second sampling inspection of 1231 batches of dairy products and milk-containing foods in circulation in the second quarter of this year. Some dairy products of multiple brands were detected to exceed the standard, and 5 infant milk powders were found to have failed aflatoxin content. The Guangzhou Municipal Industry and Commerce Bureau reported that the most serious problem in this sampling was a brand of milk powder produced in Hunan. The 5 batches of infant milk powder that were sampled all contained the strong carcinogenic substance aflatoxin M1. Production time is from July to December 2011.
The Ministry of Health of China issued the GB 2761-2011 limit of mycotoxins in food on April 20, 2011. The standard was implemented on October 20, 2011. The standard stipulates that the limit of aflatoxin M1 in milk and milk products is 0.5μg / kg, and milk powder is converted according to raw milk. Consistent with the Codex Alimentarius Commission's limit requirements for aflatoxins in dairy products. China's 2010 edition of the Chinese Pharmacopoeia quality standards stipulates that no more than 5 μg of aflatoxin B1 per 1000 g, and no more than 10 μg of aflatoxin G2, G1, B2, and B1. Since aflatoxin fluorescence quenches in aqueous solution, it is usually analyzed by fluorescence detection after derivatization. There are two types of derivatization methods: pre-column and post-column. Pre-column derivatization generally uses trifluoroacetic acid. Post-column derivatization includes iodine solution, perbrominated pyridinium bromide, and electrochemical and photochemical derivatization. The sample preparation method usually adopts the immunoaffinity column purification method.
Shimadzu Corporation, which has always been at the forefront of safeguarding the safety of human life, has relied on its strong analysis and detection strength in various security incidents in recent years, providing the first time to complete the application in various fields such as food, medicine, environment, etc. Detection solution. In response to this dairy product aflatoxin excess incident, Shimadzu quickly launched a detection scheme for aflatoxin in food and medicinal materials. The scheme covers post-iodine derivatization, post-light column derivatization, and electrochemical post-column derivation. There are conventional liquid chromatography methods, as well as ultra-high performance liquid chromatography rapid high-sensitivity analysis methods, and relevant data are obtained for the analysis of samples in food and Chinese herbal medicines. Each of these methods has its own advantages: the ultra-high performance liquid chromatography electrochemical post-column derivatization method uses Shimadzu ’s highest-end LC-30A ultra-high performance liquid chromatograph, which can provide fast, accurate and highly sensitive analysis, and the quantitation limit of aflatoxin B1 can be Up to 0.04 ng / mL, without the need for derivative liquid, the cost of derivatization equipment is low; post-iodine column derivatization method combined with conventional liquid phase is the 2010 version of the Pharmacopoeia analysis method, which can make full use of the existing derivation equipment and can respond well to food and traditional Chinese medicine Daily detection requirements; post-column derivatization method and iodine post-column derivation method, the cost of derivatization equipment is further reduced and no derivative liquid is required, the half-width is narrower and the sensitivity is further improved, which is expected to become a new method in the 2010 edition of the Pharmacopoeia. Provide a complete aflatoxin analysis solution for relevant institutions and practitioners.
The specific response plan is as follows:
1. Ultra-high performance liquid chromatography electrochemical derivatization method with high sensitivity and rapid detection of aflatoxin
2. Immunoaffinity column purification photochemical derivatization liquid chromatography for the detection of aflatoxin in Chinese herbal medicine Baiziren
3. Detection of aflatoxin M1 in milk powder by immunoaffinity column purification liquid chromatography
4. Liquid chromatography after iodine column derivatization and light column derivatization to detect aflatoxin in Chinese medicinal materials
5. Liquid chromatography after derivatization with iodine column to detect aflatoxin in nuts
6. Determination of the content of aflatoxin G2, G1, B2, B1 in the Chinese medicinal material Sour Dates by HPLC after derivatization with iodine column
For details, please consult the "Shimadzu Global Application Technology Development Support Center". support hotline
About Shimadzu
Shimadzu Enterprise Management (China) Co., Ltd. is a local legal person company established in China in 1999 by Shimadzu Corporation to expand the scale of its business in China.
At present, Shimadzu Enterprise Management (China) Co., Ltd. has 13 branches throughout China, and its business scale is continuously expanding. There are 5 analysis centers in Beijing, Shanghai, Guangzhou, Shenyang and Chengdu; a network of sales agents covering 30 provinces across the country; and more than 60 technical service stations to build a complete system for providing good services to users.
As a global production base, Shimadzu has built a product production and supply system not only for Chinese customers, but also for the world, and strives to build a product production system that meets the requirements of the Chinese market. With the goal of "for the health of mankind and the earth", Shimadzu will always strive to provide users with more advanced products and more satisfactory services.
For more information, please visit Shimadzu's website.
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