成人免费xx,国产又黄又湿又刺激不卡网站,成人性视频app菠萝网站,色天天天天

ChemicalBook >> journal list >> Talanta >>article
Talanta

Talanta

IF: 5.59
Download PDF

Oxidative polyacrylonitrile nanofiber-based solid-phase microextraction coatings via wrapping strategy for polychlorinated biphenyls determination coupled to GC-MS

Published:4 December 2024 DOI: 10.1016/j.talanta.2024.127335 PMID: 39652997
Kaili Yang,?Li Xiao,?Shishu Yang,?Caixia Ji,?Suling Feng,?Shengrui Xu

Abstract

A straightforward approach to fabricating robust and versatile solid-phase microextraction (SPME) fibers is crucial for the extensive research and application of this notable sample preparation technique. Herein, we proposed a strategy for preparation of oxidative polyacrylonitrile (O-PAN) and O-PAN/ZIF-67 nanofiber-based SPME coatings by wrapping an electrospinning membrane on the stainless-steel wire, following with thermal oxidation at 300?°C. The shrinkage of membrane during thermal treatment resulted in the nanofibers being securely affixed to the stainless-steel wire, thereby creating a robust nanofiber-based SPME fiber. Furthermore, the characterizations results indicated that the thermal oxidation significantly enhanced the generation of oxygen-/nitrogen-containing groups within the nanofibers, which were conducive to the adsorption for the analytes. Given the exceptional properties, the proposed O-PAN/ZIF-67 coating was applied to extract and analyze polychlorinated biphenyls (PCBs) pollutants coupled with GC-MS, and exhibited superior extraction performances. The proposed analytical method presented a wide linear range spanning concentrations from 0.5 to 2500?ng?L-1, with a low detection limit ranging between 0.029 and 0.093?ng?L-1. Additionally, it demonstrated good precision, as evidenced by a relative standard deviation of 4.5?%-8.1?%, and was effectively utilized for the analysis of real water samples. This study introduced a novel, simple, and versatile methodology for the fabrication of nanofiber-based SPME coatings, offering a significant advancement in the field.

Substances (3)

Materials
Procduct Name CAS Molecular Formula Supplier Price
N,N-Dimethylformamide 68-12-2 C3H7NO 1215 suppliers $11.20-$12200.00
Methanol 67-56-1 CH4O 833 suppliers $9.00-$7620.00
Poly(dimethylsiloxane) 9016-00-6 (C2H6OSi)n 292 suppliers $21.65-$2858.63

Similar articles

IF:3.1

Quantitative GC determination of sodium triacetoxyborohydride (STAB)

Journal of pharmaceutical and biomedical analysis Ian Hale , James Chadwick ,etc Published: 5 September 2021
IF:1.8

Advances in Fmoc solid-phase peptide synthesis

Journal of Peptide Science Raymond Behrendt, Peter White,etc Published: 20 January 2016
IF:5.8

Triethyl phosphate (TEP) as a green solvent for solid-phase peptide synthesis (SPPS)

Green Chemistry Letters and Reviews K.P. Nandhini, Nosipho Cele,etc Published: 21 March 2024