State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
Analyst. 2011 Jun 7;136(11):2379-84. doi: 10.1039/c0an00918k. Epub 2011 Apr 14.
Fluorosurfactant (FSN)-capped gold nanoparticles (GNPs), which exhibit higher stability at a wider pH range and high ionic strength, were utilized for investigating the chemiluminescence (CL) effect on the reaction between high concentration carbonate (~0.3 M) and peroxynitrous acid. When the pH of the colloidal solution was 10.2 by dropwise addition of 0.05 M NaOH, FSN-capped GNPs offer an enhanced CL intensity. Based on the CL spectra, XPS spectra and the quenching effect of reactive oxygen species, a possible CL mechanism is proposed. The tolerance of FSN-capped GNPs towards salt concentrations (salt proofing effect) within a large pH range is an interesting feature, compared to the other previously reported work on nanoparticles CL systems. The CL intensity is proportional to the concentration of nitrite in the range from 0.1 to 100 μM. The detection limit (S/N = 3) is 0.036 μM and the relative standard deviation (RSD) for seven repeated measurements of 0.5 μM nitrite was 2.4%. This method has been successfully applied to determine nitrite in tap waters with recoveries of 97-106%.
氟表面活性剂（FSN）包覆的金纳米粒子（GNPs）在更宽的 pH 范围和高离子强度下表现出更高的稳定性，被用于研究高浓度碳酸盐（约 0.3 M）和过氧亚硝基之间的反应的化学发光（CL）效应酸。当通过逐滴添加 0.05 M NaOH 将胶体溶液的 pH 值调节至 10.2 时，FSN 包覆的 GNPs 提供了增强的 CL 强度。基于 CL 光谱、XPS 光谱和活性氧的猝灭效应，提出了一种可能的 CL 机制。与其他先前报道的纳米粒子 CL 系统相比，FSN 包覆的 GNPs 对盐浓度（耐盐性）在大 pH 范围内的耐受性是一个有趣的特征。CL 强度与 0.1 至 100 μM 范围内的亚硝酸盐浓度成正比。检测限（S/N = 3）为 0.036 μM，0.5 μM 亚硝酸盐的 7 次重复测量的相对标准偏差（RSD）为 2.4%。该方法已成功应用于测定自来水中的亚硝酸盐，回收率为 97-106%。
