| 催化动力学光度法测痕量镁 |
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| 引用本文： | 石慧,吴新华.催化动力学光度法测痕量镁[J].辽宁化工,2009,38(12):895-896,902. |
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| 作者姓名： | 石慧 吴新华 |
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| 作者单位： | 湖南化工职业技术学院,湖南,株洲,412004 |
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| 摘 要： | 在pH=11的NH3-NH4Cl缓冲溶液中，Mn（Ⅱ）催化KIO4氧化酸性铬蓝K的反应可被痕量Mg^2＋有效的阻抑，利用此反应可建立起一种分光光度法测定痕量镁的新方法，方法的线性范围是0．05—0．20mg／L，检出限为8．4×10^-9g／mL。此方法用于海带痕量Mg^2＋测定获得了满意的结果。
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| 关 键 词： | 催化反应 镁 光度法 |
Determination of Trace Magnesium by Catalytic Kinetic Spectrophotometry |
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| SHI Hui,WU Xin-hua.Determination of Trace Magnesium by Catalytic Kinetic Spectrophotometry[J].Liaoning Chemical Industry,2009,38(12):895-896,902. |
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| Authors: | SHI Hui WU Xin-hua |
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| Affiliation: | (Hunan Vocational College of Chemical, Zhuzhou 412004, China) |
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| Abstract: | When acid chrome blue K was oxidized to deeolorize by KIO4 - Mn （ Ⅱ ） system in NH9 - NH4Cl buffer solution of pH = 11, magnesium ion could inhibit the reaction. A kinetic speetrophotometric method for determination of trace magnesium was proposed . the results show that the detection limit of this method is 8.4 × 10^-9 g/mL ,the linearity range of the detection is 0.05 - 0.20 mg/L at the magnesium absorption wavelength of 540 nm. The method has been applied to determine magnesium ion in the sample of kelp and the result is satisfactory. |
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| Keywords: | Inhibit reaction Magnesium Kinetic spectrophotometry |
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