Optimal conditions for specifying formaldehyde using several reagents with the help of visible spectrometric technique

This study deals with the comparison of (Acetyl acetone, Acetoacetanilide, chromotropic acid disodium salt) used as reagents for determine formaldehyde, and to fixed the optimal analytical conditions of the above signed reagents using VIS-Spectrophotometer. The optimal analytical conditions of each reagent are compared with each other in order to determine the optimal reagent and conditions which allow to determining formaldehyde as possible at its lowest detection limit. The results of this study are compared with other studies used the same reagents, but by contrast analytical conditions. The lowest detection limit for chromotropic acid disodium salt ranged between (0.0100 - 0.0125 ppm) with recovery ranged between (108.543- 119.444%) depending on the reproducibility of three sequence separated experiments (independent samples). This detection limit is twice times lower than the detection limit 0.02 ppm registered according to the study achieved by method (NIOSH 3500).(author)