I_3^-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 I_3^- and Its Effect Analysis

作　　者：范翔[1] 吕昌银[1] 刘运美[2] 王志湘[1] 宁玲[1] 贺元文[1] 

机构地区：[1]南华大学公共卫生学院卫生化学检验学教研室,衡阳421001 [2]南华大学生命科学与技术学院,衡阳421001

出　　处：《分析化学》2007年第8期1207-1210,共4页Chinese Journal of Analytical Chemistry

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)。In a weak acid and then the ion-associate medium, Malachite Green （MG） react with I3^- to form an ion-associate complex, 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 RRS, with a high sensitivity and the detection limits of 3.6 μg/L. The effects of pH and matrix intensity of RRS were analyzed based on the conditional stability constant and matrix effect. through on the

关 键 词：孔雀石绿 碘 共振瑞利散射 基体效应 稳定常数 

分 类 号：TS207.5[轻工技术与工程—食品科学]