With the development of society, people pay more attention to pollution on food safety. After the case of“pet food in USA”and“Sanlu milk in china”, The analytical technique of melamine and other toxic and harmful pollutants in environment field has become a hotspot of analytical chemistry research. Since low content of melamine in food and environment, complex matrix, and high sensitive, high selective is required, high performance liquid chromatography (HPLC) and liquid chromatography-mass spectrometry (LC...