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A novel electrochemical paper sensor for low-cost detection of 5-methyltetrahydrofolate in egg yolk.
- Source :
-
Food chemistry [Food Chem] 2021 Jun 01; Vol. 346, pp. 128901. Date of Electronic Publication: 2021 Jan 05. - Publication Year :
- 2021
-
Abstract
- An electrochemical deposition method was used to fabricate a gold nanoflower (AuNF) and carbon nanoparticle (CNP) modified carbon paper (CP) sensor (AuNFs-CNPs/CP) for the low-cost detection of 5-methyltetrahydrofolate (5-mTHF) in egg yolk. AuNF morphology and structures were characterized by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS), revealing nanoflower sizes in the 50 to 200 nm range. AuNFs formed on the sensor were in the Au <superscript>0</superscript> . We evaluated 5-mTHF assay performance using cyclic voltammetry, differential pulse voltammetry and chronoamperometry. The AuNFs-CNPs/CP sensor detected 5-mTHF concentrations in the ranges from 1 to 5 mg L <superscript>-1</superscript> and 1-20 μg L <superscript>-1</superscript> , with an excellent limit of detection of 1 μg L <superscript>-1</superscript> and good selectivity toward 5-mTHF, when compared to other potentially interfering molecules in samples. The AuNFs-CNPs/CP sensor was also used to detect 5-mTHF in folate-rich, and was found to be twice than that of ordinary egg yolk.<br /> (Copyright © 2020. Published by Elsevier Ltd.)
Details
- Language :
- English
- ISSN :
- 1873-7072
- Volume :
- 346
- Database :
- MEDLINE
- Journal :
- Food chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 33450645
- Full Text :
- https://doi.org/10.1016/j.foodchem.2020.128901