锌(Ⅱ)-硫氰酸盐-中性红体系共振瑞利散射法测定痕量锌
Chinese Journal of Analysis Laboratory（2014）
Abstract
在pH5.1的HAc-NaAc缓冲溶液中,聚乙烯醇存在下,Zn(Ⅱ)和硫氰酸盐形成的配阴离子[Zn(SCN)4]2-与中性红阳离子结合形成的离子缔合物具有共振瑞利散射光谱,其最强共振瑞利散射峰位于594.5 nm处.基于共振瑞利散射峰的增强,建立了测定痕量Zn(Ⅱ)的共振瑞利散射方法.Zn2+质量浓度在0 ～0.5 μg/mL范围内呈良好的线性关系,检出限为1.9×10-5 μg/mL.方法已用于水样中Zn2+的测定.
MoreKey words
Resonance rayleigh scattering, Neutral red dye, Zinc (Ⅱ)
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