Catalytic-Kinetic Photometric Determination of Traces of Formaldehyde

In a weakly acidic medium of about 0.04 mol·L-1 H2SO4,the oxidation of methyl orange by potassium bromate was significantly catalyzed by formaldehyde.Linear relationship was kept between the magnitude of decrease in absorbance at 510 nm and the concentration of formaldehyde in the range of 0.08-0.48 mg·L-1 corresponding to the linear regression equation ΔA=1.563 2 C-0.044 1(C:mg of HCHO per L)and…