In this study, a rapid flow injection-flame atomic absorption spectrometry for cyanide detection was developed. Different AgX (where X is Cl -, Br -, I -and N3 -) solid-phase reagents (SPR) were tested for indirect determination of cyanide. In a single-line FIA system, the cyanide was allowed to react with AgX SPR, which in turn changed Ag ions in AgX to silver cyanide complexes in a sodium hydroxide carrier stream. The eluent containing the analyte as silver cyanide complexes was measured by FAAS. The calibration curve was linear up to 30 mg l -1 with a detection limit of 0.05 mg l -1 for cyanides. The sampling rate and the relative standard deviation were <1.09% and >200 h -1 , respectively. The method was applied to the determination of cyanide in electroplating wastewater.
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