The analysis of ambient air for N02 concentrations of 1 ppm and below was originally reported by Saltzman in 1954 (1). Since that time the method has been applied to the analysis 15 53 53
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.