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  • Title: Application of Ag2X (X=SO3(2-), Cr2O7(2-), C2O4(2-) and CO3(2-)) solid-phase reagents for indirect determination of cyanide in the industrial effluent using FIA-FAAS system.
    Author: Noroozifar M, Khorasani-Motlagh M, Zare-Dorabei R.
    Journal: Talanta; 2007 Jul 31; 72(5):1773-8. PubMed ID: 19071831.
    Abstract:
    Four solid-phase reagents have been tested for indirect determination of cyanide using flow injection analysis-flame atomic absorption spectrometry (FIA-FAAS). The method is based on insertion of aqueous cyanide solutions into an on-line Ag(2)X (where X are SO(3)(2-), Cr(2)O(7)(2-), C(2)O(4)(2-) and CO(3)(2-)) packed column (25%, m/m suspended on silica gel beads) and re-distilled water or sodium hydroxide are used as the carrier stream. The eluent containing the analyte as silver cyanide complexes, produced from reaction between Ag(2)X and cyanide, measured by flame atomic absorption spectrometry. The method is simple, fast and selective than other published FIA procedures. A relative standard deviation (R.S.D.) better than 1.12% was obtained in a repeatability study. The method was applied to the determination of cyanide in industrial electrolytic baths.
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