|
| 纳米金共振散光谱探针测定钼 |
| Nanogold Resonance Scattering Spectral Probe for the Determination of Molybdenum |
| 投稿时间：2008-08-05 修订日期：2008-09-28 |
| DOI： |
| 中文关键词: 钼,硫氰酸钼络合物,共振散射,纳米金探针 |
| 英文关键词:molybdenum,thiocyanate complex,resonance scattering,nanogold probe |
| 基金项目:广西自然科学基金(No.0833260)和广西环境工程与保护评价重点实验室研究资金资助项目(桂科能0701k008,0701z022). |
|
| 摘要点击次数: 1347 |
| 全文下载次数: 172 |
| 中文摘要: |
| 在0.45 mol/L硫酸-0.026 mol/L硫脲-0.32 mol/L KSCN介质中，粒径为70 nm的纳米金的共振散射信号较弱, Mo(Ⅵ) 被硫脲还原为Mo(Ⅴ)，Mo(Ⅴ)与硫氰酸钾生成橙红色配合物[MoO(SCN)5]2-. 该配合物与纳米金探针作用，导致402和554 nm共振散射峰增强.钼浓度在1.0~20×10-6 mol/L范围内与402 nm波长的共振散射光强度成线性关系，方法的检出限为5.1×10-7 mol/L Mo.该法用于废水中钼的测定，结果满意. |
| 英文摘要: |
| In sulfuric acid-thiourea-potassium thiocyanate medium, nanogold in size of 70 nm exhibit weak resonance scattering signal. Mo(Ⅵ) is reduced to Mo(Ⅴ) by thiourea, and Mo(Ⅴ) reacts with potassium thiocyanate to form a orange-red complex . When the complex coexists with gold nanoparticles, there are two resonance scattering peaks at 402 nm and 554 nm respectively. Mo(Ⅴ) concentration in the range of 1.0~20×10-6mol/L is proportional to the enhanced resonance scattering intensity at 402 nm, with detection limit of 5.10×10-7 mol/L Mo. This method was applied to determination of Mo in waste water, with satisfactory results. |
| HTML 查看全文 查看/发表评论 下载PDF阅读器 |