【讨论】用拉曼光谱能测出奶粉中的三聚氰胺吗

用一般激光拉曼，能做到1%就差不多了。
但是已有研究采用纳米金基底，可作到最低一个ppm以下的检测限。08年初的文章。

我们实验室已经用增强拉曼技术做到了0.5ppm，待测样为处理过的鲜牛奶插标样本。

用红外光谱仪（振动光谱）对样品中含有的三聚氢胺的结构进行定性检测后（这种检测是非常规检测，只在极少数情况下采用），再利用普通显微镜对形态进行观察，这样就可以准确判定其是否含有三聚氰胺。

痕量物质的检测，只能借助于拉曼增强试剂。

表面增强拉曼如何定量?

现阶段是定性半定量

Hi, It sounds amazing. Could I ask which group you come from? Which kinds of sample did you use for the 0.5 ppm test? How about the reproducibility and uniformity? Sorry for so many questions~~. Anyway, thank you!

Hi, It sounds amazing. Could I ask which group you come from? Which kinds of sample did you use for the 0.5 ppm test? How about the reproducibility and uniformity? Sorry for so many questions~~. Anyway, thank you!

你好，我使用的检测样本是商品液态奶插标，检测方法是增强拉曼技术，使用的仪器是optotrace的Ramtracer200。现在国内做的检测限是0.5ppm，美国的同事做的检测限是0.2ppm，已作重复性实验。