Daniel Weston L, Han Min Su, Lee Jae-Seung, Mirkin Chad A
Department of Chemistry and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA.
J Am Chem Soc. 2009 May 13;131(18):6362-3. doi: 10.1021/ja901609k.
We report the development of a novel colorimetric nitrite and nitrate ion assay based upon gold nanoparticle probes functionalized with Griess reaction reagents. This assay takes advantage of the distance-dependent plasmonic properties of the gold nanoparticles and the ability of nitrite ion to facilitate the cross coupling of novel nanoparticle probes modified with aniline and naphthalene moieties. The assay works on the concept of a kinetic end point and can be triggered at the EPA limit for this ion in drinking water (highlighted in red, microM). This rapid and simple assay could be useful for on-site water quality monitoring.
我们报告了一种基于用格里斯反应试剂功能化的金纳米粒子探针的新型比色法亚硝酸盐和硝酸盐离子测定方法。该测定方法利用了金纳米粒子的距离依赖性等离子体特性以及亚硝酸根离子促进用苯胺和萘部分修饰的新型纳米粒子探针交叉偶联的能力。该测定方法基于动力学终点的概念，并且可以在饮用水中该离子的美国环境保护局（EPA）限值（以红色突出显示，微摩尔）处触发。这种快速且简单的测定方法可用于现场水质监测。
