Synthesis of spindle-like amino-modified Zn/Fe bimetallic metal-organic frameworks as sorbents for dispersive solid-phase extraction and preconcentration of phytohormoes in vegetable samples.
Food Chem
; 409: 135272, 2023 May 30.
Article
em En
| MEDLINE
| ID: mdl-36623357
ABSTRACT
Amino-modified Zn/Fe bimetallic metal-organic frameworks (NH2-Zn/Fe-MIL-88) were synthesized using a one-step solvothermal method with FeCl3·6H2O and Zn(NO3)2·6H2O as metal salts and 2-aminoterephthalic acid as organic ligand. The morphology of NH2-Zn/Fe-MIL-88 can be regulated from octahedral-like to spindle-like with changing molar ratios of metal salts. Using NH2-Zn/Fe-MIL-88 as sorbent, a dispersive solid-phase extraction with putting sorbents into sample solution to extract targets was developed to preconcentrate phytohormones in vegetables. To study the extraction efficiency, a series of NH2-Zn/Fe-MIL-88s with varying molar ratios of metal salts were prepared. The results indicated that NH2-Zn/Fe-MIL-88(1) presented the highest extraction efficiency (82.6 %-98.1 %) to phytohormones among all prepared NH2-Zn/Fe-MIL-88(x). The limits of detection were calculated at 0.07-0.15 ng/mL. The adsorption isotherms and kinetic parameters of NH2-Zn/Fe-MIL-88 for phytohormones were conformed to Langmuir and pseudo-second-order models. The NH2-Zn/Fe-MIL-88 as sorbent combined with HPLC was applied to detect phytohormones in cucumber and tomato samples.
Palavras-chave
1-Naphthylacetic acid (PubChem CID 6862); 2-Naphthylacetic acid (PubChem CID 11393); 6-Benzylaminopurine (PubChem CID 62389); Abscisic acid (PubChem CID 5375199); Bimetallic metal-organic framework; Dispersive solid-phase extraction; Indole-3-acetic acid (PubChem CID 802); Indole-3-butyric acid (PubChem CID 8617); NH(2)-Zn/Fe-MIL-88; Phytohormones; Zn/Fe bimetal-organic framework
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Estruturas Metalorgânicas
Idioma:
En
Revista:
Food Chem
Ano de publicação:
2023
Tipo de documento:
Article
País de afiliação:
China