铬(Ⅵ)-碘化钾-结晶紫体系的共振瑞利散射及其分析应用

Resonance Rayleigh scattering of chromium(Ⅵ) iodide crystal violet system and its analytical application

研究了铬（Ⅵ）碘化钾结晶紫体系的共振瑞利散射光谱，考察了它们的光谱特征、影响因素和适宜的反应条件．确定了散射强度与铬（Ⅵ）的浓度关系，提出了用ＲＲＳ光谱间接测定痕量铬（Ⅵ）的新的高灵敏方法．

he spectra of resonance Rayleigh scattering of chromium(Ⅵ) iodide crystal violet system,the affecting factors and optimum conditions of the reaction,and the quantitative relation of the I RRS to the concentration of Cr(Ⅵ) have been investigated.The concentration of Cr(Ⅵ) is proportion to the ΔI RRS in the 0～125μg/mL.The method has very highly sensitivity,the detection limit of Cr(Ⅵ) is 0 065ng/mL.The new analytical way for indirect determination of trace amounts of Cr(Ⅵ) by RRS was proposed.