Back to Search
Start Over
A SnO 2 /Bi 2 S 3 -based photoelectrochemical aptasensor for sensitive detection of tobramycin in milk.
- Source :
-
Food chemistry [Food Chem] 2021 May 15; Vol. 344, pp. 128716. Date of Electronic Publication: 2020 Nov 25. - Publication Year :
- 2021
-
Abstract
- 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 SnO <subscript>2</subscript> /Bi <subscript>2</subscript> S <subscript>3</subscript> -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 SnO <subscript>2</subscript> , and Bi <subscript>2</subscript> S <subscript>3</subscript> , 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 SnO <subscript>2</subscript> /Bi <subscript>2</subscript> S <subscript>3</subscript> at 450 °C.<br /> (Copyright © 2020. Published by Elsevier Ltd.)
- Subjects :
- Animals
Electrochemical Techniques methods
Electrochemistry
Food Analysis
Photochemical Processes
Tobramycin metabolism
Aptamers, Nucleotide metabolism
Biosensing Techniques methods
Bismuth chemistry
Limit of Detection
Milk chemistry
Sulfides chemistry
Tin Compounds chemistry
Tobramycin analysis
Subjects
Details
- Language :
- English
- ISSN :
- 1873-7072
- Volume :
- 344
- Database :
- MEDLINE
- Journal :
- Food chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 33267988
- Full Text :
- https://doi.org/10.1016/j.foodchem.2020.128716