微分脉冲伏安法
检出限
电化学气体传感器
电化学
材料科学
循环伏安法
纳米复合材料
亚硝酸盐
化学工程
傅里叶变换红外光谱
分析化学(期刊)
纳米技术
化学
电极
硝酸盐
有机化学
色谱法
物理化学
工程类
作者
Elhameh Saeb,Karim Asadpour‐Zeynali
标识
DOI:10.1016/j.electacta.2022.140278
摘要
A novel electrochemical sensor has been introduced in the present work. The proposed sensor is a nanocomposite of imidazole zeolites and gold metal nanoparticles that was easily designed and synthesized (core-shell [email protected]/Au NPs). This sensor was used to determine nitrite using the differential pulse voltammetry (DPV) technique. Nanocomposites have been characterized using transmission electron microscopy (TEM), Fourier transform (FT-IR), field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), ultraviolet spectroscopy, scattered X-ray spectroscopy Energy (EDX) and electrochemical element maps and electrochemical techniques. After the plotted the calibration diagram with the differential pulse voltammetry technique, the detection limit was 2 nM and the linear range was obtained 0.64×10−8-22.14×10−3 M for nitrite oxidation. Therefore the method is simple, sensitive, and specific, with a short analysis time, and the main advantages of this purpose sensor are the easy synthesis method, low limit of detection, and good selectivity, excellent stability, reproducibility, and good repeatability in nitrite determination. One of the successes of this sensor is in determining nitrite in water, sausage, and deli meat samples.
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