| 磷钼杂多酸-奎宁体系共振光散射测定微量磷 |
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| 引用本文： | 李正平,郝龙腾,成永强. 磷钼杂多酸-奎宁体系共振光散射测定微量磷[J]. 河北大学学报(自然科学版), 2008, 28(2): 158-161. DOI: 10.3969/j.issn.1000-1565.2008.02.012 |
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| 作者姓名： | 李正平 郝龙腾 成永强 |
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| 作者单位： | 河北大学,化学与环境科学学院,河北,保定,071002 |
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| 摘 要： | 在0.25 mol/L H2SO4介质中,PO43-,MoO42-反应生成磷钼杂多酸,它与阳离子染料奎宁可形成稳定的离子缔合物,并在398.0 nm处产生灵敏的共振光散射(RLS)峰,磷质量浓度在1～200 μg/L内与共振光散射强度成良好线性关系,对磷的检出限(3σ)为0.5 μg/L.由此建立了一种测定微量磷的共振光散射分析方法.该方法具有操作简便、灵敏度高、选择性好的优点.
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| 关 键 词： | 磷 奎宁 离子缔合物 杂多酸 共振光散射 |
| 文章编号： | 1000-1565(2008)02-0158-04 |
| 修稿时间： | 2007-09-19 |
Determination of Micro Amounts of Phosphorous with Resonance Light-scattering Technique by Using the System of Phosphomolybdate Heteropoly Acid-quinine |
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| LI Zheng-ping,HAO Long-teng,CHENG Yong-qiang. Determination of Micro Amounts of Phosphorous with Resonance Light-scattering Technique by Using the System of Phosphomolybdate Heteropoly Acid-quinine[J]. Journal of Hebei University (Natural Science Edition), 2008, 28(2): 158-161. DOI: 10.3969/j.issn.1000-1565.2008.02.012 |
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| Authors: | LI Zheng-ping HAO Long-teng CHENG Yong-qiang |
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| Abstract: | In the medium of 0.25 mol/L H2SO4,PO43-reacts with MoO42-to produce phosphomolybdate heteropoly acid,which can combine cationic dye-quinine to form an associated complex.The complex exhibits a sensitive resonance light-scattering(RLS) peak at 398.0 nm.There is good linear relationship between the RLS intensity and the concentration of phosphorous in the range of 1～200 μg/L.The detection limit(3σ) for phosphorous is 0.5 μg/L.Based on this,a new RLS method for determination of micro amounts of phosphorous has been established.The proposed method is convenient,sensitive and selective. |
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| Keywords: | phosphorous quinine associated complex heteropoly acid resonance light-scattering |
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