ISO/TR 11434:1992 镍合金.铌和钽的测定.离子交换法

标准编号：ISO/TR 11434:1992

中文名称：镍合金.铌和钽的测定.离子交换法

英文名称：Nickel alloys — Determination of niobium and tantalum — Ion exchange method

发布日期：1992-11

标准范围

该方法基于将盐酸-氢氟酸混合物中的样品溶液通过离子交换柱，通过洗涤去除除铌和钽以外的所有元素，从树脂床分离铌和钽，重量法测定作为五氧化物的洗脱铌和钽（如果含量较高）。否则，使用锆作为高铁酸铜的共沉淀。镍合金中通常存在的元素不会相互干扰。

The method is based on passing a solution of the sample in a hydrochloric-hydrofluoric acid mixture through an ion exchange column, removal of all elements other than niobium and tantalum by washing, separation of niobium and tantalum from the resin bed, gravimetric determination of the eluted niobium and tantalum as the pentoxides, if present at high levels. Otherwise coprecipitation with zirconium as cupferrates is used. The elements normally found in nickel alloys do not interfere.

标准预览图