**Author details**

**Figure 14.** SERS spectra of white spirit without and with PCBs.

**Figure 15.** SERS spectra of Melamine and trace Melamine in milk.

In the year 2009, milk produced by Sanlu Co. (China) was found to contain amounts of Mel‐ amine in much higher concentrations than usual. Milk with Melamine seems to contain more protein when detecting nitrogen concentration, but it is poisonous to children. With the SERS method with silver nanorods as substrates, we detected Melamine in milk. Figs 15

(a) and (b) show the SERS spectra of pure Melamine and milk with Melamine.

**4.3. Detection of Melamine in milk**

50 Organic Pollutants - Monitoring, Risk and Treatment

Zhengjun Zhang1 , Qin Zhou1,2 and Xian Zhang1

\*Address all correspondence to: zjzhang@mail.tsinghua.edu.cn

1 Advanced Materials Laboratory, Department of Materials Science and Engineering, Tsing‐ hua University, Beijing, P. R. China

2 Institute of nuclear and new energy technology, Tsinghua University, Beijing, P. R. China
