铌与钽因镧系收缩离子半径几乎相等,致化学性质甚接近,其分离与测定长期被视为分析化学难题之一。由于二元素在冶金、原子能工业及其他最新技术部门应用日广,随之其分析化学亦迅速发展。近年有关铌与钽的综合性述评颇多,其中用中文撰写或译载者主要涉及二元素无机制备分离等方面。近一、二年积累了很多新的资料,丰富了铌、钽分析化学。本文试图从分析化学角度,就二元素分离与测定问题之文献现状,作一梗概的介绍与讨论。奠定铌、钽分析化学基础的席勒(schoeller)等的系统研究报导,是以沉淀法为中心的。他们提出草酸、酒石酸等络合剂,并应用单宁酸进行一系列分离。目前,用单宁分级沉淀分离铌与钽的方法早已为其他 Niobium and tantalum due to lanthanide-based contracting ions radius almost equal to the chemical properties are very close, the separation and determination of long-term as one of the analytical chemistry problems. As the two elements in the metallurgy, atomic energy industry and other new technology sector is widely used, followed by its rapid development of analytical chemistry. In recent years, there have been a lot of reviews on the comprehensiveness of niobium and tantalum, among which the compilation or translation in Chinese mainly involves the separation and preparation of two-element inorganic preparations. Nearly a year or two accumulated a lot of new information, enriched niobium, tantalum analysis chemistry. This article attempts to give an introduction and discussion of the literature about the separation and determination of two elements from the perspective of analytical chemistry. Systematic reports of schoeller, which laid the foundations for the analysis of niobium and tantalum chemistry, are based on the precipitation method. They proposed oxalic acid, tartaric acid and other complexing agents, and the application of tannic acid for a series of separation. At present, the method for the separation of niobium and tantalum by tandem grading is already known