U.S.A. develops and gathers the new method of cyanogen amine three times while measuring the milk fast

U.S.A. develops and gathers the new method of cyanogen amine three times while measuring the milk fast
Beijing, April 2 (Xinhuanet) synthesize this Ren HaiJun, reporter to Washington of society, reporter to Los Angeles plateau to report: American researchers say on the 1st, they develop a simple, convenient new method, whether can detect and contain and gather cyanogen amine three times in the milk within short time.
The researchers of organizations such as the Los Angeles branch schools of American Miami University, Northwest University and University of California,etc. say, they inject hydrochloric acid into the milk first, precipitate out casein, in order to prevent its interference to three detection which gather the cyanogen amine. Then add the gold nanometer particle, this kind of particle, when each other distance in solution is farther into milk solution, solution is red; When the distance becomes near, solution is blue.
Researchers point out, gather the distance of permutation that cyanogen amine can change the gold nanometer particle three times, thus cause solution color to change. So, if solution color changes, prove that may contain and gather cyanogen amine three times among them after adding the gold nanometer particle. In order to guarantee accuracy, researchers add cyanogen urine impractically in solution subsequently, the latter and three will form the macroscopic precipitate to gather cyanogen amine after reacting.
Researchers introduce, utilize such new method, include and gather cyanogen amine three times when can detect the milk in not exceeding time for 15 minutes. Have already published and " employed the physical communication " in U.S.A. on the magazine in relevant research results.
Three it gathers the intersection of cyanogen and amine to be one low-toxicity industrial chemicals, excessive to take a photograph of affiliation, harmful to urinary system. World Health Organization can tolerate the intaking amount to set for this chemical material for per kilogram of weight 0 every day 2008. 2 milligrams.
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