title: New spot-test for cyanide ion and cyanogen gas.
abstract: A new, rapid and simple spot test has been developed for detection of both cyanide ion and cyanogen gas. The cyanogen gas must first be converted into cyanide ion by reaction with sodium hydroxide. On addition of a Cu(II) solution the cyanocuprate(I) complex formed reduces the molybdate solution to molybdenum blue.
authors.affiliation: Chemistry Department, Faculty of Science, A'in Shams University, Microanalytical Chemistry Unit, National Research Centre, Dokki, Cairo, U.A.R.
authors.forename: S K
authors.initials: SK
authors.lastname: Tobia
authors.forename: Y A
authors.initials: YA
authors.lastname: Gawargious
authors.forename: M F
authors.initials: MF
authors.lastname: El-Shahat