酚类物质在鲁米诺-硝酸银-纳米金体系中化学发光行为研究

摘要

Luminol-AgNO3-gold nanoparticles system has a strong chemical luminescence(CL) phenomena.When polyphenol compounds are added in the system, the cheminescence signals have different degrees of change.-OH in the phenolics can interact with the nanometer gold, and the interaction is related to the number and location of-OH in the phenolic compounds.Combined with the flow injection chemiluminescence method, hydeoquinone, catechol and phthalate were determined.The detection limits are 4.0×10-11, 8.0×10-10, 2.6×10-9 g/mL, respectively.The method was successfully used to determine catechol in water.The recovery is 97.5%-105%, and the relative standard derivations (RSD) is 1.4%-2.5%.The possible mechanism of the CL reaction was discussed, and the CL method for determination of the polyphenol compounds was proposed.%鲁米诺-硝酸银-纳米金体系有很强的化学发光现象.当向该体系中加入酚类物质,化学发光信号有不同程度的变化.研究发现,酚类物质的-OH可以与纳米金产生相互作用,相互作用的大小与酚类物质所含的-OH数目、位置有关.结合流动注射化学发光法对对苯二酚、邻苯二酚、邻苯三酚进行了测定,检出限分别为4.0×10-11,8.0×10-10,2.6×10-9 g/mL.用加标回收法测定了自来水中的邻苯二酚,回收率在97.5%~105%,相对标准偏差在1.4%~2.5%,结果满意.初步讨论了酚类物质对此体系化学发光强度影响的机理,建立了测定多酚类物质的化学发光分析新方法.