铬(Ⅵ)-碘化物-维多利亚蓝4R体系的共振瑞利散射和二级散射及其分析应用

Resonance Rayleigh Scattering and Second-Order Scattering of Chromium(Ⅵ )-Iodide-Victoria 4R System and Its Analytical Application

研究了铬（Ⅵ）．碘化物．维多利亚蓝４Ｒ体系的共振瑞利散射光谱和二级散射光谱，考察了它们的光谱特征、影响因素和适宜的反应条件。确定了共振瑞利散射强度和二级散射强度与铬（Ⅵ）的浓度的关系，提出了用ＲＲＳ光谱间接测定痕量铬（Ⅵ）的新的高灵敏分析方法。

This work reports a study on the spectra of resonance Rayleigh scattering (RRS), anti-second order scattering (ASOS) and second order scattering(SOS) for chromium(VI )-iodide-Victoria blue 4R system. The spectral characteristics, the effect factors and optimum conditions of the reaction have been investigated. The quantitative relationships of the intensities of RRS, ASOS and SOS to the concentration of chromium(Ⅵ ) were established. A new and high sensitive method for the indirect determination of trace chromium (Ⅵ ) in water sample based on the RRS has been proposed.