| 分光光度法测定钨矿中微量钨 |
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| 引用本文： | 涂代惠,李思敏. 分光光度法测定钨矿中微量钨[J]. 分析试验室, 2001, 20(3): 31-33 |
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| 作者姓名： | 涂代惠 李思敏 |
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| 作者单位： | 河北建筑科技学院化学教研室, |
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| 摘 要： | 提出了一种测定钨矿中微量钨的分光光度法。该法摩尔吸光系数ε为9.6× 1 0 4 L· mol-1· cm-1,相对标准偏差 <2 % ,加标回收率为 95%～ 1 0 4 %。WO3 含量在 0～ 30 μg/50 m L 范围内满足比尔定律
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| 关 键 词： | 分光光度法 钨矿 锡钨矿 钨 微量分析 CTMAB 9－（苯基）－2 3 7－三羟基－6－荧光酮 显色剂 |
| 文章编号： | 1000-0720(2001)03-0031-03 |
Analysis of microamounts of tungsten in tungsten ore by spectrophotometry |
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| TU Dai-hui,LI Si-min. Analysis of microamounts of tungsten in tungsten ore by spectrophotometry[J]. Chinese Journal of Analysis Laboratory, 2001, 20(3): 31-33 |
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| Authors: | TU Dai-hui LI Si-min |
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| Abstract: | A spectrophotometric method for determination of trace amounts of tungsten in tungsten ore or tin tungsten ore was proposed. The method is based on the color reaction of WO3 with trihydroxyphenylfluorone in the presence of hexadecyltrimethylammonium bromide(CTMAB).The interference elements(Sn,Ge,As,Sb,Bi,Pd) can be separated from samples by generation of hydride of low boiling point and volatilization at normal temperature and pressure. The molar absorptivity is 9.6×104 L*mol-1*cm-1 for WO3 and the recovery is in the range of 95%～104% with RSD of 2%.Beer′s law is obeyed within the range of 0～30 μg/50 mL for WO3. |
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| Keywords: | Spectrophotometry Tungsten Tungsten ore Tin tungsten ore |
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