摘要
用酒石酸、盐酸混合液作洗脱剂,阳离子交换树脂将矿石中的铌和钽与其它金属元素分离,洗下的铌、钽在盐酸—酒石酸介质中用5-Br-PADAP显色,用最小二乘法处理混合液的分光光度数据,建立浓度与吸光度间的最小二乘法数学模型。文中还对铌钽矿石进行分析,同时与二波长联合分光光度法比较,结果良好。
This paper described a method for simultaneous determination ofNiobium and Tantalum in the rock. Nibium and Tantalum ions are separa-ted from other elements by cation-exchange resins with mixed acid, hydro-chloric and tartaric acid, as eluant. The Niobium and Tantalum ionsseparated were reacted with colour reagent 5-Br-PADAP. The absorbanceof the mixed solution at eight wavelengths were measured. The statistics ofspectrophotometry had been solved by least squares method, and the resultsof analysis were satisfactory. This method was simple and quick as comparedwith the traditional one, and it can be used for routine analysis.
基金
国家自然科学基金
关键词
铌
钽
测定
矿石
阳离子
光度法
cation-exchange separationle
least squares method
simultaneous spectrophotometry
Niobium
Tantalum
2—(5—bromo—2—pyridylazo)—5—(diethylamino)phenol
