According to "Science Daily" April 1, 2010 reported that the Miami University College of Engineering Assistant Professor Li and her Cooperation Who has invented a fast, economical and easy to detect Dairy In Melamine Method. In 2007, China contaminated pet Food Melamine found; 2008, in China contaminated Dairy products Also found in the compound. Dairy products of melamine are added to thousands of people sick, especially children. The occurrence of this situation led to the world of Chinese dairy products were recalled.
On melamine contamination Dairy Monitoring remains a universal concern. Melamine is a frequently used Plastic And fertilizer in the industrial chemicals. Because melamine is rich in nitrogen, when the melamine added to food, make food appear protein detection in the standard of higher value. However, when the intake of melamine, the chemical can cause serious health problems, and under certain conditions may lead to death.
In published in "applied physics letters" magazine online edition, entitled "Rapid Detection of Gold Nanoparticles by the non-modified full-fat regulation Milk Of melamine, "the study, researchers describe the new method. The study is the use of gold nanoparticles and a color sedimentation test, developed an easy and accurate method of detecting melamine. Complete testing method can be completed in 15 minutes.
"The current method of detection of melamine in milk costly and time-consuming long," Li said, she was University of Miami School of Mechanical and Aerospace Engineering Department Engineering Assistant Professor, she is also the author of the study's senior communications. "Our rapid detection of melamine on behalf of our goal to have taken an important step, will address a critical global issue." Researchers first isolated from the milk of dairy proteins, as casein protein would interfere with the detection of melamine . Second, the solution particles. The interaction of gold nanoparticles with melamine will produce a significant color change, can instruct the presence of melamine. When there is melamine, the solution color will be a few seconds quickly from red to blue, but also by the naked eye and also detected by spectrophotometry. In order to further increase accuracy, you can continue to add cyanuric acid, as cyanuric acid and melamine can be a special kind of chemical reaction occurs. If there is melamine, will form a sediment, which can also by visual observation and spectrophotometry to determine.
"This approach provides us with a unique opportunity for us to use highly sensitive nano-particle detection features to prevent people from being poisoned because of melamine intake," Dean? He said that he is Northwestern University biomedical and mechanical engineering, and Robert? Lurie Comprehensive Cancer Center assistant professor, also a co-author of the study. "The use of nano-particle detection is very important, nanoparticles can carry out high-volume production, this gives us a way to widely used detection method is possible."
In the future, researchers hope to develop a simple commercial kit, enough for most people in the home or outdoor use to detect melamine in food contamination. "Our approach not only provides a new alternative method based on laboratory tests, but also provides a way to an early screening of dairy products, especially in the case of field work, and the milk supply in developing countries, "Wei-fang said that she was the University of California Los Angeles (UCLA), mechanical and aerospace engineering assistant researcher, is also first author of the study.
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