Catalytic Kinetic Spectrophotometric Determination of Trace Formaldehyde

Based on in sulfuric acid medium,the formaldehyde on the oxidation of potassium bromate fading reaction of acid chrome blue K has significant catalytic role,to establish the dynamics photometric method of determination of trace formaldehyde.Under selected conditions,the method of linear ranged from 0.040 to 0.807 mg·L-1,and linear regression equation for Δ A=0.354C+0.015(type C quality for formaldehyde concentration,in mg·L-1).Trace formaldehyde in the wastewater and wheat flour was determined by using this method,the determination results of relative standard deviation(RSD) were less than 4.7%(n=5),measured recovery rate was between 93.7%~106%,and the results were satisfied.