By a News Reporter-Staff News Editor at Life Science Weekly -- Investigators publish new report on Biological Factors. According to news reporting originating from Saratov, Russia, by NewsRx correspondents, research stated, "A quantitative fluorescence-labeled immunosorbent assay and qualitative on-site column tests were developed for the determination of aflatoxin M1 in milk products. The use of liposomes loaded with quantum dots as a label significantly increased the assay sensitivity by encapsulating multiple quantum dots in a single liposome and, therefore, amplifying the analytical signal."
Our news editors obtained a quote from the research from N.G. Chernyshevsky Saratov State University, "Two different techniques were compared to obtain aflatoxin-protein conjugates, used for further coupling with the liposomes. The influence of nonspecific interactions of the liposome-labeled conjugates obtained with the surface of microtiter plates and column cartridges was evaluated and discussed. The limit of detection for fluorescence-labeled immunosorbent assay was 0.014 mu g kg(-1). For qualitative on-site tests, the cutoff was set at 0.05 mu g kg(-1), taking into account the EU maximum level for aflatoxin M1 in raw milk, heat-treated milk, and milk for the manufacture of milk-based products. The direct addition of labeled conjugate to the milk samples resulted in an additional decrease of analysis time. An intralaboratory validation was performed with sterilized milk and cream samples artificially spiked with aflatoxin M1 at concentrations less than, equal to and greater than the cutoff level. It is shown that milk products can be analyzed without any sample preparation, just diluted with the buffer."
According to the news editors, the research concluded: "The rates for false-positive and false-negative results were below 5 % (2.6 % and 3.3 %, respectively)."
For more information on this research see: Liposomes loaded with quantum dots for ultrasensitive on-site determination of aflatoxin M1 in milk products. Analytical and Bioanalytical Chemistry, 2013;405(24):7795-7802. Analytical and Bioanalytical Chemistry can be contacted at: Springer Heidelberg, Tiergartenstrasse 17, D-69121 Heidelberg, Germany. (Springer - www.springer.com; Analytical and Bioanalytical Chemistry - www.springerlink.com/content/1618-2642/)
The news editors report that additional information may be obtained by contacting N.V. Beloglazova, Saratov NG Chernyshevskii State Univ, Inst Chem, Dept. of Gen & Inorgan Chem, Saratov 410012, Russia. Additional authors for this research include P.S. Shmelin, I.Y. Goryacheva and S. De Saeger (see also Biological Factors).
Keywords for this news article include: Russia, Saratov, Eurasia, Aflatoxins, Mycotoxins, Quantum Dots, Quantum Physics, Biological Factors
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