纳米金的制备及其检测水中重金属Cr³⁺的应用研究  

Preparation of Nano Gold and Its Application in Detection of Heavy Metal Cr3+ in Water

作　　者：黄嘉婕 苏润 严瑾 周亚红[1] 

机构地区：[1]江苏警官学院刑事科学技术系,江苏南京

出　　处：《化学工程与技术》2019年第3期178-185,共8页Hans Journal of Chemical Engineering and Technology

基　　金：江苏警官学院重点项目,项目编号:SJYX2017Zd05;江苏省教育厅自然科学重大项目(18KJA620001);江苏警官学院科研创新团队(2018SJYTD03);江苏省“十三五”一级学科省重点建设学科资助项目;江苏省食品药品与环境犯罪检验技术工程实验室。

摘　　要：用偏钨酸铵修饰于纳米金颗粒(AuNPs)表面,并用少量的pH = 6.86的混合磷酸盐缓冲溶液调节pH值,使功能化纳米金溶液呈中性。当偏钨酸铵-AuNPs与Cr3+水溶液反应时,会产生颜色变化,可以用于比色分析。实验结果得到分光光度法的线性方程为y = 0.8901x ? 0.2814,线性范围0.3~1 μg?mL?1,其检出限达0.14 μg?mL?1。因此,研究偏钨酸铵-AuNPs分光光度法可用于水中Cr3+的快速检测。The functionalized nanogold solution was neutralized by modifying the surface of the gold nano-particles(AuNPs)with ammonium metatungstate and adjusting the pH with a small amount of mixed phosphate buffer solution with pH=6.86.When ammonium metatungstate-AuNPs are re-acted with an aqueous solution of Cr3+,a color change is produced which can be used for colorimetric analysis.The experimental results show that the linear equation of spectrophotometry is y=0.8901x?0.2814,the linear range is 0.3-1μg?mL?1,and the detection limit is 0.14μg?mL?1.Therefore,the study of ammonium metatungstate-AuNPs spectrophotometry can be used for the rapid detection of Cr3+in water.

关 键 词：金属铬离子 纳米金 功能化 偏钨酸铵 比色分析 

分 类 号：O65[理学—分析化学]