苯萃取-结晶紫光度法快速测定铌铁合金中钽  

Determination of the Tantalum in Nb-Fe Alloy through Benzene Extraction-Crystal Violet Photometric Method

作　　者：董丙成[1] 李西忠[1] 高文红[1] 张平建[1] 张建敏[1] 

机构地区：[1]莱芜钢铁集团有限公司,山东莱芜271104

出　　处：《山东冶金》2008年第2期56-57,共2页Shandong Metallurgy

摘　　要：试样以氢氟酸、硝酸溶解后,在酒石酸-氢氟酸介质中,钽酸与氢氟酸形成阴离子TaF6-,与结晶紫生成蓝紫色的络合物,用苯萃取出来采用光度法测定钽量,测定结果均在国标允许误差范围内。此方法操作简便、快速,易于掌握,分析一个样品仅需30 min。The sample was dissolved by hydrofluoric acid and hydrogen nitrate, then the tantalite and hydrofluoric acid formed TaF6^- in the media of tartaric acid-hydrofluoric acid. TaF6^- reacted with crystal violet and formed purple complex compound. This complex compound was extracted by benzene and the content of tantalum was measured in photometric method. The results are in the range of GB. This method is easy and fast to corporate. It only takes 30 minutes to analyze a sample.

关 键 词：苯萃取结晶紫光度法 铌铁合金 钽 

分 类 号：O657.32[理学—分析化学]