Metal-organic framework derived magnetic nanoporous carbon as an adsorbent for the magnetic solid-phase extraction of chlorophenols from mushroom sample

• Published in: Chinese chemical letters Vol. 27; no. 5; pp. 783 - 788
• Main Authors: Hao, Lin, Liu, Xing-Li, Wang, Jun-Tao, Wang, Chun, Wu, Qiu-Hua, Wang, Zhi
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.05.2016
• Subjects: Chlorophenols; High performance liquid chromatography; Magnetic nanoporous carbon; Magnetic solid-phase extraction; Metal-organic frameworks; Mushroom; 吸附剂; 固相萃取; 多孔碳; 样品; 氯酚; 磁性纳米粒子; 蘑菇; 金属有机; Chlorophenols; Magnetic solid-phase extraction; Metal-organic frameworks; Magnetic nanoporous carbon; High performance liquid chromatography; Mushroom
• ISSN: 1001-8417; 1878-5964
• DOI: 10.1016/j.cclet.2016.01.021

In this work, a metal-organic framework derived nanoporous carbon （MOF-5-C） was fabricated and modified with Fe3O4 magnetic nanoparticles. The resulting magnetic MOF-5-derived porous carbon （Fe304@MOF-5-C） was then used for the magnetic solid-phase extraction of chlorophenols （CPs） from mushroom samples prior to high performance liquid chromatography-ultraviolet detection. Scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and N2 adsorption were used to characterize the adsorbent. After experimental optimization, the amount of the adsorbent was chosen as 8.0 mg, extraction time as 10 min, sample volume as 50 mL, desorption solvent as 0.4 mL （0.2 mL × 2） of alkaline methanol, and sample pH as 6. Under the above optimized conditions, good linearity for the analytes was obtained in the range of 0.8-100.0 ng g 1 with the correlation coefficients between 0.9923 and 0.9963. The limits of detection （SIN= 3） were in the range of 0.25-0.30 ng g-1, and the relative standard deviations were below 6.8%. The result showed that the Fe304@MOF-5-C has an excellent adsorption capacity for the analytes.