Abstract:

Azo-compound inedible pigments are considered as one kind of carcinogens, thus it is necessary to rapidly detect them in food. This article mainly reviewed the detection of azo-compound pigments such as Sudan I and acid orange by spectrophotometric analysis, chromatography and elecrtochemistry analysis, and expatiated on the application of new technology in detection of Sudan I. It was proposed that celerity, sensitivity, low cost and strong applicability are the main selecting criteria of detection method. Both of stripping and cyclic voltammetries of electrochemistry may rapidly, accurately, qualitatively and quantitatively detect single azo-compound in food, but for coexisted azo-compounds their veracity still need to be further discussed.

Key words: synthetic pigment, azo-compound pigment, Sudan I, acid orange