Tuning the planarity of molecularly imprinted covalent organic frameworks for selective extraction of ochratoxin A in alcohol samples.
Food Chem
; 451: 139427, 2024 Sep 01.
Article
in En
| MEDLINE
| ID: mdl-38692237
ABSTRACT
Here, we report a monomer planarity modulation strategy for room-temperature constructing molecularly imprinted-covalent organic frameworks (MI-COFs) for selective extraction of ochratoxin A (OTA). 2,4,6-triformylphloroglucinol (Tp) was used as basic building block, while three amino monomers with different planarity were employed as modulators to explore the effect of planarity on the selectivity of MI-COFs. The MI-TpTapa constructed from Tp and the lowest planarity of monomer Tapa gave the highest selectivity for OTA, and was further used as the adsorbent for dispersed-solid phase extraction (DSPE) of OTA in alcohol samples. Coupling MI-TpTapa based DSPE with high-performance liquid chromatography allowed the matrix-effect free determination of OTA in alcohol samples with the limit of detection of 0.023 µg kg-1 and the recoveries of 91.4-97.6%. The relative standard deviation (RSD, n = 6) of intra and inter day was <3.2%. This work provides a new way to construct MI-COFs for selective extraction of hazardous targets.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Food Contamination
/
Solid Phase Extraction
/
Molecular Imprinting
/
Ochratoxins
Language:
En
Journal:
Food Chem
Year:
2024
Document type:
Article
Affiliation country:
China
Country of publication:
Reino Unido