Citation: CHAI Rui-Tao, LIU Yu-Teng, ZHANG Guo, ZHU Wei-Huang, CHEN Yu-Yun, FENG Jian-Jun, CHAI Shou-Ning. Selective Determination of Hydrazine Hydrate on Palladium Hydrogels-modified Electrochemical Sensor[J]. Chinese Journal of Analytical Chemistry, ;2018, 46(3): 432-437. doi: 10.11895/j.issn.0253-3820.171435 shu

Selective Determination of Hydrazine Hydrate on Palladium Hydrogels-modified Electrochemical Sensor

1.
School of Science, Xi'an University of Architecture and Technology, Xi'an 710055, China;
2.
School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
3.
School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, China

Received Date: 20 November 2017
Revised Date: 27 December 2017

Fund Project: This work was supported by the National Natural Science Foundation of China (No. 21205092), the Talent Foundation of Xi'an University of Architecture and Technology (No. RC1306), the Youth Foundation of Xi'an University of Architecture and Technology(No. QN1434)and the Open Foundation of Chang'an University (No. 310829161130).

Palladium hydrogel capped by β-cyclodextrins (Pd_β-CD) was prepared by a facile method with β-cyclodextrins and palladium(Ⅱ) chloride, which were then modified onto the surface of gold electrode. The morphology and structure of the as-prepared palladium hydrogel were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), while the electrochemistry behaviors of gold electrode modified by Pd_β-CD were investigated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The results indicated the sensor had high electrochemistry response to hydrazine hydrate in the presence of K⁺, Na⁺, Mg²⁺, NH₄⁺, Ni₂⁺, Mn²⁺, Cl^-, NO₃^-, SO₄^2-, PO₄^3-, HCOO^-, C₆H₅O₃^-. Under the optimized conditions, the oxidized peak current showed linear relationship with the concentration of hydrazine hydrate in the concentration range of 25-950 μmol/L and the limit of detection (LOD) of 1.6 μmol/L(S/N=3).Owing to the facile preparation, high sensitivity and selectivity, the sensor has potential applications in determination of hydrazine hydrate in real water samples.
- Palladium,
- Hydrogels,
- Electrochemistry,
- Sensor,
- Hydrazine hydrate
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