Effect of pyrogallic acid cleaning nitrite and blocking nitrosamines
To study the focus of pyropyrogallic acid cleaning nitrite and blocking nitrosamines and the mechanism. Using ultraviolet spectrophotometry to research the pyrogallic acid cleaning nitrite and blocking nitrosamine at different temperatures, p H, concentration and reaction time, and on the order of add reactants, buffers. Besides, comparing the effect about cleaning nitrite and blocking nitrosamines of the six different materials which contains the hydroxy. The temperature, p H and reaction time and the add of buffers all have an impact on the nitrite clearance. And within a certain range of concentrations, with concentration of the pyrogallic acid increaing, the removal rate and nitrosamines blocking rate showed an upward trend, the nitrite maximum clearance rate to 86.56%, the biggest block for nitrosamines was 83%, are closer to Vc and other strong blocker. Suppose the mechanism which pyrogallic acid blocks the generation of nitrosamines is it clear nitrite first.