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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

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【作者】 范翔吕昌银刘运美王志湘宁玲贺元文

【Author】 Fan Xiang1,Lü Chang-Yin1,Liu Yun-Mei2,Wang Zhi-Xiang1,Ning Ling1,He Yuan-Wen11(Department of Health Laboratory Technology,School of Public Health,Nanhua University,Hengyang 421001)2(School of Life Science and Technology,Nanhua University,Hengyang 421001)

【机构】 南华大学公共卫生学院卫生化学检验学教研室南华大学生命科学与技术学院南华大学公共卫生学院卫生化学检验学教研室 衡阳421001衡阳421001

【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.

  • 【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
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