Tapioca Biofilm Containing Nitrogen‐doped Titanium Dioxide Nanoparticles for Electrochemical Detection of 17‐β Estradiol,Electroanalysis

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Tapioca Biofilm Containing Nitrogen‐doped Titanium Dioxide Nanoparticles for Electrochemical Detection of 17‐β Estradiol
Electroanalysis ( IF 2.7 ) Pub Date : 2017-09-12 , DOI: 10.1002/elan.201700392
Gabriela C. Mauruto de Oliveira ₁ , Elisangela P. de Palma ₂ , Marcos H. Kunita ₂ , Roberta Antigo Medeiros ₃ , Roberto de Matos ₃ , Kelly Roberta Francisco ₁ , Bruno C. Janegitz ₁

Affiliation

A novel sensor architecture based on thin film of tapioca decorated within nitrogen‐doped titanium dioxide (N‐TiO₂) nanoparticles is reported. The nanostructures were characterized by scanning electron microscope, transmission electron microscope, X‐rays diffraction and voltammetric techniques. The proposed electrode was used for detection of low concentrations of 17‐β estradiol in without purification step, which was investigated by using linear sweep adsorptive stripping voltammetry. Under optimal conditions, the analytical curve was linear over a 17β‐estradiol concentration range of 9.9×10⁻⁶ to 1.4×10⁻⁵ mol L⁻¹, with a detection limit of 1.7×10⁻⁷ mol L⁻¹. The tapioca and N‐TiO₂ nanoparticles homogeneous film was applied for detection of 17‐β‐estradiol in tap water and synthetic urine samples, which presented satisfactory results.

中文翻译：

含有氮掺杂的二氧化钛纳米粒子的木薯生物膜用于电化学检测17-β雌二醇

报告了一种新颖的传感器结构，该结构基于在木薯薄膜上装饰的氮掺杂的二氧化钛（N-TiO ₂）纳米粒子。通过扫描电子显微镜，透射电子显微镜，X射线衍射和伏安技术对纳米结构进行了表征。拟议的电极无需纯化即可用于检测低浓度的17-β雌二醇，方法是使用线性扫描吸附溶出伏安法进行研究。在最佳条件下，分析曲线在9.9×10 ^-6至1.4×10 ^-5 mol L ^-1的17β-雌二醇浓度范围内呈线性，检测极限为1.7×10 ^-7 mol L ^-1。木薯粉和N‐TiO在自来水和合成尿液样品中使用_2个纳米颗粒均质膜检测17-β-雌二醇，结果令人满意。

更新日期：2017-09-12

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