title: A comparative study of AgX (X = Cl(-), Br(-), I(-) and N(3)(-)) solid-phase reactors for flow-injection determination of cyanide in electroplating wastewater.
abstract: 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 N(3)(-)) 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.
authors.affiliation: Analytical Research Laboratory, Department of Chemistry, University of Sistan & Baluchestan, Zahedan, Iran. mnoroozifar@chem.usb.ac.ir
authors.forename: Meissam
authors.initials: M
authors.lastname: Noroozifar
authors.forename: Mozhgan
authors.initials: M
authors.lastname: Khorasani-Motlagh
authors.forename: Aboozar
authors.initials: A
authors.lastname: Taheri
authors.forename: Rohollah
authors.initials: R
authors.lastname: Zare-Dorabei
mesh_terms: D003486:Cyanides / Q000032:analysis* / Q000737:chemistry; D004595:Electroplating; D017022:Flow Injection Analysis / Q000295:instrumentation / Q000379:methods*; D006219:Halogens / Q000737:chemistry*; D017672:Nitrogen Compounds / Q000032:analysis* / Q000737:chemistry; D018030:Silver Compounds / Q000032:analysis* / Q000737:chemistry; D052616:Solid Phase Extraction / Q000295:instrumentation / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry
chemical_list: D003486:Cyanides; D006219:Halogens; D017672:Nitrogen Compounds; D018030:Silver Compounds; D014874:Water Pollutants, Chemical