Sequential flow-injection determination of cyanide and weak metal-cyanide complexes with flow-through heterogeneous membrane electrodes

E. Figuerola, A. Florido, M. Aguilar, J. De Pablo, S. Alegret

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16 Citations (Scopus)

Abstract

Free cyanide and cyanide present in weak complexes are determined by using two flow- through silver iodide/silver sulphide electrodes with an intervening gas diffusion unit. Under optimal conditions, the linear range is 10-5-10-3 mol dm-3 cyanide, and the relative standard deviations are ca. 2%, with a sampling rate of 20 h-1. Total cyanide can be determined in the presence of Zn(II), Cu(II) and Cd(II) but results are low with Ni(II), Co(II) or Fe(III) present. Sulphide and thiocyanate must be absent. © 1988.
Original languageEnglish
Pages (from-to)283-288
JournalAnalytica Chimica Acta
Volume215
Issue numberC
DOIs
Publication statusPublished - 1 Jan 1988

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