Design and preparation of magnetic mesoporous melamine–formaldehyde resin: A novel material for pre‐concentration and determination of silver

• Published in: Applied organometallic chemistry 2019-09, Vol.33 (9), p.n/a
• Main Authors: Zhao, Yanfang, Xu, Lubin, Yang, Chenggen, Chen, Tian, Yu, Lei
• Format: Article
• Language: English
• Subjects: Chemistry; flame atomic absorption spectrometry; Iron oxides; Linearity; magnetic melamine–formaldehyde resin; magnetic solid‐phase extraction; Melamine; Melamine formaldehyde resins; Selectivity; silver
• ISSN: 0268-2605; 1099-0739
• DOI: 10.1002/aoc.5112

Using commercially available melamine and formaldehyde as the starting materials, a magnetic mesoporous melamine–formaldehyde resin (MMF@Fe3O4) possessing large surface area was prepared via a simple method and could be used as an efficient adsorbent for magnetic solid‐phase extraction. Compared with the traditional synthetic methods of MMF@Fe3O4, this approach is easily operated under mild conditions, is time‐saving and environmentally friendly, and can produce the material in high yields. The as‐prepared MMF@Fe3O4 possesses good adsorption capacity and selectivity for silver ions. The affecting factors such as pH, amount of MMF@Fe3O4, extraction time, desorption solvent, eluent concentration and sample volume were systematically investigated and optimized. Under the optimized conditions, the material exhibited a good response to silver ions at concentrations in the range 2.0–200 μg l−1 with good linearity (r2 = 0.9982), while the limit of detection was found to be 0.12 μg l−1. The material was successfully applied to the determination of silver in a variety of water samples. By using commerciallyavailable melamine and formaldehyde as the starting materials, magneticmesoporous melamine‐formaldehyde resin (MMF@Fe3O4) possessinglarge surface area was prepared via a simple method and could be used as theefficient adsorbent of magnetic solid phase extraction. Compared with the traditionalsynthetic methods of MMF@Fe3O4, this approach is easilyoperated under mild conditions, time saving and environment‐friendly, and canproduce the materials in high yields. The asprepared MMF@Fe3O4possesses good adsorption capacity and selectivity for silver ions.