(Chienet al., 2011). However, recently melamine was fraudulently added to protein-containing products (such as dairy products and animal feeds) to increase the apparent protein measurement (Lin, 2009;Tittlemier, 2010). The maximum residue level (MRL) for melamine set by many countries and by WHO are 1 mg kg1 for infant formula and 2.5 mg kg1 for other milk and milk-based foods or all other foods (FAO/WHO, 2010). Thus, rapid and sensitive analytical method to detect melamine in foods is very urgent