State Key Laboratory of Biogeology and Environmental Geology, Faculty of Materials Science and Chemistry, China University of Geosciences, Hongshan District, No. 388, Lumo Road, Wuhan, 430074, People's Republic of China.
Mikrochim Acta. 2021 Oct 31;188(11):400. doi: 10.1007/s00604-021-05060-0.
MOF-derived zink and nitrogen co-doped porous carbon (ZNPC) was synthesized through the pyrolysis of MOF-5-NH and used as a solid-phase microextraction (SPME) coating material. Coupled with gas chromatography-mass spectrometry (GC-MS), headspace SPME (HS-SPME) based on ZNPC was adopted for the determination of phenols in food samples. The co-existence of N and Zn in ZNPC endows the derived carbon superior hydrophilicity, which is highly beneficial for phenols capture. After optimizing the conditions of extraction and desorption, a sensitive analytical method was established with low limits of detections (LODs, 0.73-2.3 ng g) and wide linear ranges (5-5000 ng g). Both the intra-fiber repeatability (RSDs from 2.8-7.3%) and inter-fiber reproducibility (RSDs from 9.7-11.7%) were satisfactory. The established method was applied to phenol determination in beef jerky and duck neck with satisfactory recoveries of 81.2-120.4% and RSDs of 2.8-9.9%, which met well with the requirement of practical application.
MOF 衍生的锌和氮共掺杂多孔碳（ZNPC）是通过 MOF-5-NH 的热解合成的，用作固相微萃取（SPME）涂层材料。结合气相色谱-质谱（GC-MS），采用基于 ZNPC 的顶空 SPME（HS-SPME）测定食品样品中的酚类化合物。ZNPC 中 N 和 Zn 的共存赋予了衍生碳优异的亲水性，这对酚类物质的捕获非常有利。在优化萃取和解吸条件后，建立了一种灵敏的分析方法，具有较低的检测限（LOD，0.73-2.3ng g）和较宽的线性范围（5-5000ng g）。纤维内重复性（RSD 为 2.8-7.3%）和纤维间重现性（RSD 为 9.7-11.7%）均令人满意。该方法用于测定牛肉干和鸭颈中的苯酚，回收率为 81.2-120.4%，RSD 为 2.8-9.9%，符合实际应用的要求。
