一种新的三氮烯试剂的合成并应用于金(Ⅲ)离子的显色反应  

Synthesis of a New Triazene Reagent and Its Application to the Color Reaction with Gold(Ⅲ) Ion

作　　者：陈文宾[1,2] 郑秋霞[2] 马卫兴[2] 许兴友[2] 

机构地区：[1]江苏省海洋资源开发研究院 [2]化学工程学院,淮海工学院,连云港222005

出　　处：《理化检验（化学分册）》2011年第1期1-4,共4页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：教育部重点试验室开放基金资助项目(CPEUKF06-04);淮海工学院江苏海洋资源开发研究院基金资助项目

摘　　要：以4-氨基安替比林和对氨基苯磺酸为主要反应物,制备了1-（4-安替比林）-3-（对苯磺酸）三氮烯（ASTA）。采用红外光谱法对ASTA的分子组成及结构作了检测。研究了该试剂与金（Ⅲ）的显色反应。在含有Triton X-100的pH 10.3的硼砂-氢氧化钠缓冲溶液中,ASTA与金（Ⅲ）反应生成配合比为2∶1的橙红色配合物,在其最大吸收波长496 nm处的表观摩尔吸光率为1.8×10^5L·mol^-1·cm^-1。金（Ⅲ）的质量浓度在0.06-1.05 mg·L^-1范围内与其吸光度呈线性关系,方法的检出限（3S/N）为0.02 mg·L^-1。方法用于含金矿样品中金（Ⅲ）的测定,结果与原子吸收光谱法相一致,方法的回收率在109.0%-118.2%之间,相对标准偏差（n=6）小于4.0%。A new reagent,1-（4-antipyrinyl）-3-（sulfanilic acid）-triazene（ASTA）,was synthesized by the reaction between 4-antipyrine and sulfanilic acid.Molecular composition and structure of ASTA were determined by FT-IRS.It was found that in a Na2B4O7-NaOH buffer medium of pH 10.3 containing Triton X-100,a stable coordination complex（R∶Au^3＋=2∶1） was formed by the reaction of ASTA with gold ion,having the absorption maximum at 496 nm.Linear relationship between values of absorbance and concentration of Au（Ⅲ） ion was obtained in the range of 0.06-1.05 mg·L^-1.Detection limit（3S/N） found was 0.02 mg·L^-1.The apparent molar absorptivity of the color system was found to be 1.8×10^5L·mol^-1·cm^-1.The proposed method was applied to the determination of Au（Ⅲ） in gold ore samples,and the results obtained were in consistency with those obtained by AAS.Values of recovery were found in the range of 109.0%-118.2% and RSD（n=6） was less than 4.0%.

关 键 词：1-(4-安替比林)-3-(对苯磺酸)三氮烯 分光光度法 金(Ⅲ) 

分 类 号：O657.32[理学—分析化学]