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乳牛摄取黄曲霉毒素(AFT)B_1及 B_2后,奶中可排出致癌物 M_1及 M_2。所以要注意奶制品中 M_1的污染。作者改进测定奶制品中AFT 及确证 M_1的方法。并用该法测定了281份奶制品。1.测定方法:样品50 g 加水及丙酮,搅拌、过滤。取滤液加酸性醋酸铅脱蛋白。离心后加正己烷脱脂。除去正己烷,以氯仿提取滤液三次。加5%氯化钠溶液洗氯仿层。氯仿提
After ingesting aflatoxins (AFT) B_1 and B_2 in dairy cows, the carcinogens M_1 and M_2 were excreted in milk. So pay attention to dairy products M_1 pollution. The authors improve the method of determining AFT in dairy products and confirming M_1. 281 milk products were determined by this method. 1. Determination: Sample 50 g water and acetone, stirring, filtration. Take the filtrate plus acidic lead acetate deproteinized. After centrifugation plus n-hexane degreasing. The n-hexane was removed and the filtrate was extracted three times with chloroform. Add 5% sodium chloride solution to wash the chloroform layer. Chloroform mention