Abstract: Food safety is closely linked to people’s health and standard of living. More and more people are attended food safety since a lot of food safety affairs have taken place in recent years. The rapid analysis methods of the three poisonous agents in food, including formaldehyde, sulfur dioxide and nitrite, and free chlorine in water are investigated. The improved rapid analysis methods are based on titration with DPD (4-amino-N,N-diethylaniline dihydrochloride) -ferrous ammonium sulfate for free chlorine, AHMT (4-Amino-3-hydrazino-5-mercapto-1,2,4- triazole) visual color for formaldehyde, PRA (pararosaniline) visual color for sulfur dioxide and N-1-Naphthylethylenediamine visual color for nitrite. The rapid analysis kits are developed by adjusting reagents and sampling the handling procedures. The kits-methods’ error is below 15% and can be used for semi-quantity rapid analysis. The kits have advantages of simple handling procedures, short time consuming, not requiring special equipment and comparatively prescience.
Key words: Food safety; Rapid analysis kits; Formaldehyde; Nitrite; Sulfur dioxide
