A SnO2/Bi2S3-based photoelectrochemical aptasensor for sensitive detection of tobramycin in milk

被引：59

作者：

Liu, Xiao ^{[1
]}

Jiang, Yuning ^{[1
]}

Luo, Jing ^{[1
]}

Guo, Xiaoyu ^{[1
]}

Ying, Ye ^{[1
]}

Wen, Ying ^{[1
]}

Yang, Haifeng ^{[1
]}

Wu, Yiping ^{[1
]}

机构：

[1] Shanghai Normal Univ, Coll Chem & Mat Sci, Shanghai 200234, Peoples R China

来源：

FOOD CHEMISTRY | 2021年 / 344卷

基金：

中国国家自然科学基金;

关键词：

Bismuth sulfide; Tobramycin; Photoelectrochemistry; Milk sample; MASS-SPECTROMETRY; LABEL-FREE; DNA; NANOPARTICLE; EXTRACTION; QUANTIFICATION; RESIDUES; APTAMER; GROWTH; OXIDE;

D O I：

10.1016/j.foodchem.2020.128716

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Abuse of tobramycin (TOB) causes a series of diseases. Therefore, the development of rapid and sensitive method for analyzing TOB in food products is necessary. In this work, aptamer modified SnO2/Bi2S3 -based photoelectrochemical (PEC) sensor was developed for the determination of TOB in milk. Under optimal condition, a wide linear response for TOB from 5 to 50 nmol/L with a limit of detection of 4.28 nmol/L is reached. The possible detection mechanism is that TOB molecules are specifically captured by aptamer, increasing electron transfer resistance and declining the photocurrent. Thanks to the favorably matched energy level of SnO2, and Bi2S3, the PEC aptasensor exhibits high sensitivity, and with the aid of oxalate, the sensitivity of the sensor is further improved. Importantly, the stability of the PEC aptasensor is also satisfactory due to the calcination of SnO2/Bi2S3 at 450 degrees C.

引用

页数：7

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