The Ultraviolet Absorption Bands Ascribed to HNO2

Abstract

Attention is drawn to the similarity of a series of absorption bands obtained by Melvin and Wulf as the results of experiments at normal temperatures with a NO–NO₂–H₂O medium and by Bone and Newitt from the explosion of a CO–H₂O–NO medium at high pressures. The formation of these bands in explosion experiments at atmospheric pressure and in static flames is described and evidence is brought forward which suggests that they may be due to the enhancement of certain bands of the normal NO₂ absorption spectrum.