Abstract
In the determination of formaldehyde, colorimetric method using 4-amino-3-hydrazino-5-mercapto-1, 2, 4-triazole (AHMT) was much better than the conventional method using chromotropic acid or acetylacetone in sensitivity, reproducibility, and simplicity of the analysis procedure. Furthermore, the method was not affected by the presence of sulfite and nitrite ions which are frequently encountered in air and water, and interfere in chromotropic acid method, and acetylacetone method is affected by sulfite ion. For these reasons, AHMT method might be recommnded for the determination of formaldehyde.
