Novel covalent organic frameworks based electrospun composite nanofiber membranes as pipette-tip strong anion exchange sorbent for determination of inorganic arsenic in rice. (15th May 2023)

• Record Type: Journal Article
• Authors: Kang, Binbin; Liu, Haoliang; Chen, Guoying; Lin, Hetong; Chen, Shaojun; Chen, Tuanwei
• Is Part Of: Food chemistry. Volume 408(2023)
• Publication Date: 2023-05-15
• Subjects: Covalent organic frameworks -- Electrospun composite nanofiber membranes -- Inorganic arsenic -- Pipette tip solid phase extraction -- Rice; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2022.135192
• Languages: English
• ISSNs: 0308-8146

Abstract

Graphical abstract: Novel covalent organic frameworks based electrospun composite nanofiber membranes as pipette-tip strong anion exchange sorbent for determination of inorganic arsenic in rice Highlights: Novel COFs-based electrospun composite nanofiber membranes were fabricated as a strong anion exchange sorbent. Quantitative extraction of As(V) was accomplished using this sorbent in PTSPE format. Reliable determination of iAs was fulfilled by PTSPE-HG-AFS in rice. Abstract: Novel covalent organic frameworks (COFs) based PAN@TpBD(NH2 )2 electrospun composite nanofiber membranes (ECNMs) were fabricated as strong anion exchange sorbent by implementing electrospinning technology. The finished sorbent was characterized, and key parameters of pipette-tip solid phase extraction (PTSPE) procedures were investigated. Inorganic arsenic (iAs) was successfully separated from rice under the optimal precondition conditions, and quantified by hydride generation-atomic fluorescence spectrometry (HG-AFS). This PTSPE-HG-AFS methodology achieved 0.015 μg L -1 detection limit, 4.67 % relative standard deviation, and 86.48～99.11 % recoveries. In this work, preparation and characterization of this novel COFs-based anion exchange sorbent, PAN@TpBD(NH2 )2 ECNMs, is described and its suitability for PTSPE applications is demonstrated.