Influence of Illuminance on the Observed Order of Reaction of Photodegradation of Nitrofurazone Solution

The relationship between the observed order of reaction of photodegradation of nitrofurazone solution and the illuminance of incident light as well as the concentration of the solution was studied. In the studies, the solutions of three concentrations were exposed to light with three different illuminance values, respectively. The results indicated that the observed order of reaction was increased with the decrease of concentration, when the illuminance was kept constant, and with the increase of illuminance when the concentration was kept constant. The observed order of reaction of photodegradation of nitrofurazone solution depended on both the concentration of the drug and the illuminance of the incident light.