Wang Haidong, Li Chongning, Luo Yanghe, Jiang Zhiliang
School of Food and Bioengineering, Hezhou University, Hezhou 542899, China.
Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, (Guangxi Normal University), Ministry of Education, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin 541004, China.
Int J Anal Chem. 2018 Dec 4;2018:4017519. doi: 10.1155/2018/4017519. eCollection 2018.
The gold nanoparticle reaction of HAuCl-HO was very slow under 60°C, and the as-prepared graphene oxide nanoribbons (GONRs) exhibited strong catalysis of the reaction to form gold nanoparticles (AuNP) that appeared a resonance Rayleigh scattering (RRS) peak at 550 nm. Upon addition of potassium pyroantimonate (PA) ligand, it was adsorbed on the GONRs surface to inhibit the catalysis to cause the RRS peak decreasing. When the analyte of Na was added, the coordination reaction between PA and Na took place to form the stable complexes of [Na(PA)] to release free GONRs catalyst that resulted in the RRS peak increasing linearly. Accordingly, a new and sensitive RRS method for Na was established, with a linear range of 0.69-25.8 nmol/L and a detection limit of 0.35 nmol/L Na.
在60°C以下，HAuCl-HO的金纳米颗粒反应非常缓慢，所制备的氧化石墨烯纳米带（GONRs）对该反应表现出强烈的催化作用，以形成金纳米颗粒（AuNP），其在550 nm处出现共振瑞利散射（RRS）峰。加入焦锑酸钾（PA）配体后，它吸附在GONRs表面以抑制催化作用，导致RRS峰降低。当加入Na分析物时，PA与Na之间发生配位反应，形成稳定的[Na(PA)]配合物，释放出游离的GONRs催化剂，导致RRS峰线性增加。据此，建立了一种新的、灵敏的测定Na的RRS方法，线性范围为0.69-25.8 nmol/L，Na的检测限为0.35 nmol/L。
