Visualized electrochemiluminescence detection of trace copper in practical food samples.
Food Chem
; 451: 139461, 2024 Sep 01.
Article
in En
| MEDLINE
| ID: mdl-38701733
ABSTRACT
Copper as a widely applied element in food supply chain can cause serious contamination issues that threats food safety. In this research, we present a quick and visible method for trace copper ion (Cu2+) quantification in practical food samples. Polymer dots (Pdots) were firstly conjugated with a copper-specific DNA aptamer and then tailored with rhodamine B (RhB) to extinguish the electrochemiluminescence (ECL) signal through a resonance energy transfer process. The selective release of RhB leads to signal restoration when exposed to trace Cu2+ levels, achieving remarkable linearity with the logarithm of Cu2+ concentration within the range of 1 ng/L to 10 µg/L with an impressively low limit of detection at 11.8 pg/L. Most notably, our device was also applicable on visualizing and quantifying trace Cu2+ (â¼0.2 µg/g) in practical Glycyrrhiza uralensis Fisch. samples, underscoring its potential as a tool for the early prevention of potential copper contamination in food samples.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Food Contamination
/
Copper
/
Electrochemical Techniques
/
Luminescent Measurements
Language:
En
Journal:
Food Chem
Year:
2024
Document type:
Article