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I3-共振瑞利散射法测定孔雀石绿及相关效应分析
Determination of Trace Malachite Green by Resonance Rayleigh Scattering Method with I3- and Its Effect Analysis
【摘要】 在弱酸性介质中,孔雀石绿与I3-形成离子缔合物,并进一步聚集成纳米粒子,在λ=468nm下,激发产生强烈的共振瑞利散射。在0.012~0.900μg/L范围内,共振光强度与孔雀石绿的含量成线性关系;线性方程为y=6273.8x+37.1,r=0.9997;本工作研究了反应的适宜条件,建立了共振瑞利法测定孔雀石绿的新方法,方法灵敏度高,检出限为3.6μg/L。在线性范围内,选择低、中、高3组浓度进行精密度实验,RSD分别为2.3%、1.7%、4.2%(n=11)。
【Abstract】 In a weak acid medium,Malachite Green(MG) react with I-3 to form an ion-associate complex,and then the ion-associate complex self-assemble to form a nanoparticle,which can emit intense Resonance Rayleigh-scattering(RRS) induced by excited ray.Under suitable conditions,the intensity of RRS was directly proportional to the mass concentration of MG.A new method was developed to assay MG through RRS,with a high sensitivity and the detection limits of 3.6 μg/L.The effects of pH and matrix on the intensity of RRS were analyzed based on the conditional stability constant and matrix effect.
【Key words】 Malachite green; iodine; resonance rayleigh scattering; matrix effect; stability constant;
- 【文献出处】 分析化学 ,Chinese Journal of Analytical Chemistry , 编辑部邮箱 ,2007年08期
- 【分类号】TS207.5
- 【被引频次】22
- 【下载频次】262