摘要
实验采用盐酸＋硝酸溶解钼精矿,然后用氨水溶解钨酸,再用硝酸铅沉淀基体钼,过滤分离,然后用硫氰酸盐光度法测定钨。在实验中着重考虑溶解试样,然后用硝酸铅能很好的除去基体钼,又用碱化溶液时主体杂质铁离子的沉淀夹带其他杂质离子,从而达到与钨沉淀分离。通过对不同含量的钼精矿中钨的测定,测定结果与原子吸收光谱法相符,相对标准偏差为0.160%~6.285%（n=6）。
The experiment used hydrochloric acid and nitric acid to dissolve molybdenum concentrate, used ammonia to dissolve tungstate , and then used lead nitrate to precipitation molybdenum substrate, after fil- tering separation, the thiocyanate spectrophotometric was used to determine the tungsten. Dissolving the sample in the experiment was considered as an important point, lead nitrate can be used to removed molyb- denum matrix very well. In alkaline solution, the main impurity iron ion with other impurities were sepa- rated from tungsten by precipitation separation. Based on the determination of tungsten in different levels of molybdenum concentrate, the determination results are consistent with atomic absorption spectrometry, the relative standard deviation is 0.160% - 6. 285% （n = 6）.
出处
《有色矿冶》
2015年第6期49-51,共3页
Non-Ferrous Mining and Metallurgy
关键词
硫氰酸盐光度法
钼精矿
钨
测定
thiocyanate spectrophotometry
molybdenum concentrate
tungsten
determination
作者简介
白小叶（1978-），女，高级工程师，主要从事有色金属化学分析及相关课题研究工作。
