摘要
目前氯磺酚S光度法是测定钢铁及合金中铌量较好的方法，但3，5－Br2－PADAP在钢中测定微量铌的应用国内尚未见报道．研究发现3，5－Br2－PADM－铌在一定酸度条件下，生成稳定的三元络合物．其方法选择性好，精度高，己应用于生产中．
Chorosulfophenol-S spectrophotometric determination of niobium in iron and steel is a good method. Only in the rang of 0.010% ~ 0.500% niobium can be determined accurately, and the niobium (about < 0.010%) can't be determined. The results show that 3, 5 - Br2- PADAP -niobium-tartaric acid forms a stable ternary complex under given conditions. This method hasn't been published in our country but is highly accurate. It is used for determination of niobium in iron and steel satisfactorily.
关键词
铌
分光光度法
钢铁材料
Niobium, Spectrophotometric, 3,5-2-brom-pyidylazo
