Visual and surface plasmon resonance sensor for zirconium based on zirconium-induced aggregation of adenosine triphosphate-stabilized gold nanoparticles |
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Authors: | Wenjing Qi Jianming Zhao Wei Zhang Zhongyuan Liu Min Xu Saima Anjum Saadat Majeed Guobao Xu |
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Institution: | 1. State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China;2. University of the Chinese Academy of Sciences, No. 19A Yuquanlu, Beijing 100049, China;3. Department of Chemistry, Faculty of Science, The Islamia University of Bahawalpur, 63100, Pakistan;4. Department of Chemistry, Bahauddin Zakaryia University, Multan 60800, Pakistan |
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Abstract: | 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 A660 nm/A518 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 Cu2+, Fe3+, Cd2+, and Pb2+. 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. |
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Keywords: | Adenosine 5&prime -triphosphate Gold nanoparticles Zr(IV) Visual and surface plasmon resonance (SPR) sensor |
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