利用台式高分辨Orbitrap LCMS测定乳品中的三聚氰胺

2015/02/15   下载量： 11 次

方案摘要

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应用领域 食品/农产品
检测样本 液体乳
检测项目 非法添加>三聚氰胺
参考标准 DB32/T 1163 鸡肝中金刚烷胺残留量的测定 液相色谱-串联质谱法

The high resolution, accurate mass Exactive mass spectrometer was shown to be sensitive in detecting <0.1 ppb melamine (0.5 pg on column) in neat standard, and response is linear from 0.1 to 100 ppb. The error for mass accuracy is <2 ppm with lock mass. Milk samples prepared by dilute-and-shoot showed severe ion suppression that was reduced with a simple 1-minute isocratic HILIC LC separation, after which a consistent response factor of 0.3-0.5 for each sample matrix was obtained for quantitation. Quantitation limits were less than 44, 65, and 110 ppb for coffee cream, infant formula and 3-in-1 instant coffee mix, respectively, exceeding the requirement of 250 ppb LOQ as stated by US FDA for infant formula.

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赛默飞色谱与质谱
钻石会员 丨 第23年
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