Abstract
Considering of the basic properties and also the two nitrogen atoms in the structure, hydrazine hydrate was employed to be an amine additive candidate, to build a Ru(bpy) 2+3 /hydrazine electrochemiluminescence (ECL) system, and ECL of Ru(bpy) 2+3 has been employed for the determination of hydrazine hydrate in the paper. The result demonstrated that the logarithmic ECL increasing (ΔECL = ECLafter addition of hydrazine − ECLbefore addition of hydrazine) versus the logarithmic concentration of hydrazine hydrate is linear over a concentration range of 1.0 × 10−9 to 1.0 × 10−5 mol/L, on both glassy carbon and Pt electrodes in a pH 9 phosphate buffer. The hydrazine hydrate detection limit was down to 1.0 × 10−9 mol/L, comparatively lower than other detection methods. To check its applicability, the proposed method was applied to the determination of hydrazine hydrate added into a tap water sample with good reproducibility and stability. All these provide a possibility to develop a novel ECL detection method for hydrazine in water.
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Acknowledgments
This work was financially supported by the National Natural Science Foundation of China (no. 21272030), the Fundamental Research Funds for the Central Universities (no. DUT11LK21), the Open Research Fund of State Key Laboratory of Bioelectronics, Southeast University, the State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, the Open Project Program of Key Laboratory of ECO-Textiles (Jiangnan University), the Ministry of Education (no. KLET1102), and the China Postdoctoral Science Foundation (no. 20100471434).
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Fig. S1
Cyclic voltammetric curves of 0.1 μmol/L hydrazine in 0.1 mol/L phosphate buffer (pH 9) at GC electrode, Scan rate: 150 mV/s. (DOCX 32 kb)
Fig. S2
Dependence of the logarithmic ECL increasing versus the logarithmic concentration of hydrazine hydrate with 0.1 mol/L Ru(bpy) 2+3 in 0.1 mol/L phosphate buffer (pH 9) at Pt electrode. (DOCX 32 kb)
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Liu, F., Li, W., Li, F. et al. Determination of hydrazine hydrate based on electrochemiluminescence of Ru(bpy) 2+3 . Environ Monit Assess 185, 4153–4158 (2013). https://doi.org/10.1007/s10661-012-2857-9
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DOI: https://doi.org/10.1007/s10661-012-2857-9