Nitrite is a common food additive. However, excessive nitrite can react with amides in the human body to form carcinogenic nitrosamine compounds. Therefore, it is necessary to detect nitrites for food safety and human health. Compared with traditional detection methods, the electrochemical method has many advantages including easy and convenient operation with simple instruments, rapid detection, and high sensitivity. Since graphene possesses many attractive electrochemical properties (i.e. a wide electrochemical window, high electrocatalytic activity and fast electron transfer rate), graphene...
