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基于溴代十六烷吡啶(CPB)与Au(CN)2-络阴离子生成的离子缔合物可被反相键合硅胶固相萃取柱萃取、富集,建立了一种从碱性氰化液中高富集倍数固相萃取金的方法。在碱性介质中,溴代十六烷吡啶(CPB)与Au(CN)2-络阴离子生成离子缔合物,该离子缔合物可被反相键合硅胶固相萃取柱萃取、富集,富集的离子缔合物可用乙醇洗脱,洗脱液经处理后用分光光度法测定,反相键合硅胶固相萃取柱不被破坏而且可重复使用。方法用于从碱性氰化液中固相萃取痕量金,萃取回收率可超过98%,研究了反向固相萃取金的机理,同时提出了一种从碱性氰化液中提取金的新工艺。
Ion-association compounds based on CPB and Au (CN) 2-complex anions can be extracted and enriched by reversed-phase bonded silica gel solid-phase extraction (SPE) column. Methods of high enrichment multiple solid phase extraction of gold in liquid. In alkaline medium, brominated hexadecylpyridine (CPB) and Au (CN) 2-complex anions form ion-association compounds, which can be reversed-phase bonded silica gel solid phase extraction column extraction, enrichment , The enriched ion-association compounds can be eluted with ethanol, the eluate is treated and measured by spectrophotometry, the reversed-phase bonded silica gel SPE column is not destroyed and can be reused. The method was applied to the solid-phase extraction of trace gold from alkaline cyanide solution. The extraction recovery rate can exceed 98%. The mechanism of reverse phase solid-phase extraction of gold was studied. At the same time, a method was proposed to extract gold from alkaline cyanide solution New craft