State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China.
Anal Chim Acta. 2013 Jul 17;787:126-31. doi: 10.1016/j.aca.2013.05.030. Epub 2013 May 27.
Owing to its high affinity with phosphate, Zr(IV) can induce the aggregation of adenosine 5'-triphosphate (ATP)-stabilized AuNPs, leading to the change of surface plasmon resonance (SPR) absorption spectra and color of ATP-stabilized AuNP solutions. Based on these phenomena, visual and SPR sensors for Zr(IV) have been developed for the first time. The A(660 nm)/A(518 nm) values of ATP-stabilized AuNPs in SPR absorption spectra increase linearly with the concentrations of Zr(IV) from 0.5 μM to 100 μM (r=0.9971) with a detection limit of 95 nM. A visual Zr(IV) detection is achieved with a detection limit of 30 μM. The sensor shows excellent selectivity against other metal ions, such as Cu(2+), Fe(3+), Cd(2+), and Pb(2+). The recoveries for the detection of 5 μM, 10 μM, 25 μM and 75 μM Zr(IV) in lake water samples are 96.0%, 97.0%, 95.6% and 102.4%, respectively. The recoveries of the proposed SPR method are comparable with those of ICP-OES method.
由于其与磷酸盐的高亲和力，Zr(IV) 可以诱导腺苷 5'-三磷酸 (ATP) 稳定的金纳米粒子聚集，导致表面等离子体共振 (SPR) 吸收光谱和 ATP 稳定的金纳米粒子溶液颜色发生变化。基于这些现象，首次开发了用于检测 Zr(IV) 的可视化和 SPR 传感器。在 SPR 吸收光谱中，ATP 稳定的金纳米粒子的 A(660nm)/A(518nm) 值随 Zr(IV)浓度从 0.5μM 线性增加到 100μM(r=0.9971)，检测限为 95nM。通过视觉检测实现了对 Zr(IV) 的检测，检测限为 30μM。该传感器对其他金属离子，如 Cu(2+)、Fe(3+)、Cd(2+)和 Pb(2+)，具有优异的选择性。在湖水样品中检测 5μM、10μM、25μM 和 75μM Zr(IV) 的回收率分别为 96.0%、97.0%、95.6%和 102.4%。所提出的 SPR 方法的回收率与 ICP-OES 方法相当。
Zotero 插件