| 袁蕙霞,郭玉翠,闵慧英.钨矿石中硫氰酸盐比色法测定钨[J].矿产勘查,2014,5(4):645-648 |
| 钨矿石中硫氰酸盐比色法测定钨 |
| Determination of tungsten concentration in the tungsten ore by using Thiocyanate Colorimetry method |
| 投稿时间：2013-11-08 |
| DOI： |
| 中文关键词: 硫氰酸盐 光度法 钨 氯化亚锡 三氯化钛 |
| 英文关键词: thiocyanate photometry tungsten titanm trichloride stannous chloride |
| 基金项目: |
|
| 摘要点击次数: 2558 |
| 全文下载次数: 1461 |
| 中文摘要: |
| 钨的比色法适用于ω(WO3)小于2%样品的测定,试样以过氧化钠熔融,水浸取,铁、锰等成氢氧化物沉淀而与钨分离。控制最佳的酸度、温度、时间,采用氯化亚锡—三氯化钛双还原剂,钨与硫氰酸盐形成稳定的黄色络合物,通过对国家一级标准物质进行分析验证,测试的准确度及精密度均达到地质样品规范要求。 |
| 英文摘要: |
| The Thiocyanate colorimetric method is used for the determination of tungsten concentration for those samples in which the concentration of ω(WO3)is less than 2%. After the sample is melted with sodium peroxide and leached with water, impurities such as iron and manganese which form hydroxide precipitation, and consequently are separated from tungsten composition. The stable yellow complex, which is composited of tungsten and thiocyanate by using titanm trichloride and stannous chloride reducing agents, can be obtained by controlling acidity, temperature and reaction time. The method has been tested by the determination of tungsten in national standard reference materials and the results reach good agreement with certified values. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|