摘要
用盐酸-过氧化氢溶解试样,在2.9mol/L盐酸溶液介质中,铌与氯磺酚-S形成稳定的蓝紫色络合物,其最大吸收波长约为650nm,用分光光度法可以测定低合金钢中的铌。用该法对含铌标准样品进行测定,测得值与标准值基本一致,测定结果的相对标准偏差为2.1％～6.7％。
The samples were dissolved rapidly by hydrochloric - hydrogen peroxide. In 2. 9 mol/L HC1 medium, the color reaction forms a stable blue purple complex which has an absorption maximum at 650 nm. Niobium in the low alloy steel was determined by spectrophotometry. Niobium certified reference materials were determined by this method . The determined value was consistent with standard value, the RSD is 2. 1 % -6.7%.
出处
《化学分析计量》
CAS
2003年第6期43-44,共2页
Chemical Analysis And Meterage
关键词
分光光度法
快速测定
低合金钢
铌
niobium, spectropholometry, fast analysis, low alloy steel
