当前位置: X-MOL 学术Microchim. Acta › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Magnetic hollow bimetallic zinc/cobalt zeolitic imidazolate framework as sorbent for efficiently enriching aflatoxins combined with UHPLC-IT-MSn determination
Microchimica Acta ( IF 5.3 ) Pub Date : 2020-10-19 , DOI: 10.1007/s00604-020-04533-y
Zelan Wang 1 , Zhe Meng 1 , Mengxin Zhao 1 , Xiuqin Men 1 , Jinhui Yang 1 , Jiguang Li 1
Affiliation  

A novel magnetic hollow bimetallic zinc/cobalt-based zeolitic imidazolate framework (MHB-Zn/Co-ZIF-8) was prepared via a microwave-assisted chemical etching in methanol. The structure, morphology, and specific surface area were characterized by X-ray diffraction and FTIR spectroscopy, scanning and transmission electron microscopy, and N2 adsorption. The hollow nanostructures with high internal specific surface area, abundant active sites, and reduced aggregation of nanoparticles endow the hollow zeolitic imidazolate framework (ZIF) nanoparticle with high chemical stability, desirable durability, and excellent adsorption abilities. The MHB-Zn/Co-ZIF-8 nanoparticle was used as an effective sorbent for magnetic solid-phase extraction (MSPE) of trace aflatoxins B1, B2, G1, and G2 from fruit juice and fruit samples. The main parameters affecting the efficiency of MSPE procedures were investigated and optimized. The results show that, under optimized conditions, enrichment factors ranging from 67- to 355-fold are obtained for the target analytes. The method is linear in the range 1.0 to 100.0 ng mL−1 with correlation coefficients (R2) from 0.9960 to 0.9992. The limits of detection of four aflatoxins are in the range 0.18 to 1.50 ng mL−1 and the average recoveries range from 75.1 to 102.4%, with relative standard deviations (RSDs) less than 13.6%. This work presents the excellent extraction performance of aflatoxins B1, B2, G1, and G2 on MHB-Zn/Co-ZIF-8. In addition, the applicability of the MSPE coupling with ultrahigh-performance liquid chromatography-ion trap tandem mass spectrometry (UHPLC-IT-MSn) for trace analysis in complex matrices is shown. Graphical abstract Schematic presentation of magnetic hollow bimetallic zinc/cobalt zeolitic imidazolate framework as sorbent for efficiently enriching aflatoxins B1, B2, G1, and G2 from fruit juice samples prior to ultrahigh-performance liquid chromatography-ion trap tandem mass spectrometry (UHPLC-IT-MSn) determination. Schematic presentation of magnetic hollow bimetallic zinc/cobalt zeolitic imidazolate framework as sorbent for efficiently enriching aflatoxins B1, B2, G1, and G2 from fruit juice samples prior to ultrahigh-performance liquid chromatography-ion trap tandem mass spectrometry (UHPLC-IT-MSn) determination.

中文翻译:

磁性空心双金属锌/钴沸石咪唑骨架作为吸附剂结合 UHPLC-IT-MSn 测定有效富集黄曲霉毒素

通过甲醇中的微波辅助化学蚀刻制备了一种新型磁性空心双金属锌/钴基沸石咪唑酯骨架(MHB-Zn/Co-ZIF-8)。通过 X 射线衍射和 FTIR 光谱、扫描和透射电子显微镜以及 N2 吸附来表征结构、形态和比表面积。具有高内部比表面积、丰富的活性位点和减少纳米粒子聚集的中空纳米结构赋予中空沸石咪唑酯骨架 (ZIF) 纳米粒子高化学稳定性、理想的耐久性和优异的吸附能力。MHB-Zn/Co-ZIF-8 纳米颗粒被用作一种有效的吸附剂,用于从果汁和水果样品中提取痕量黄曲霉毒素 B1、B2、G1 和 G2 的磁性固相萃取 (MSPE)。研究并优化了影响 MSPE 程序效率的主要参数。结果表明,在优化条件下,目标分析物获得了 67 到 355 倍的富集因子。该方法在 1.0 至 100.0 ng mL-1 范围内呈线性,相关系数 (R2) 为 0.9960 至 0.9992。四种黄曲霉毒素的检出限范围为 0.18 至 1.50 ng mL-1,平均回收率范围为 75.1 至 102.4%,相对标准偏差 (RSD) 小于 13.6%。这项工作展示了黄曲霉毒素 B1、B2、G1 和 G2 在 MHB-Zn/Co-ZIF-8 上的优异提取性能。此外,还显示了 MSPE 与超高效液相色谱-离子阱串联质谱 (UHPLC-IT-MSn) 联用在复杂基质中进行痕量分析的适用性。在超高效液相色谱-离子阱串联质谱 (UHPLC-IT- MSn) 测定。在超高效液相色谱-离子阱串联质谱 (UHPLC-IT-MSn) 之前,磁性空心双金属锌/钴沸石咪唑骨架作为吸附剂,用于从果汁样品中有效富集黄曲霉毒素 B1、B2、G1 和 G2 的示意图决心。在超高效液相色谱-离子阱串联质谱 (UHPLC-IT-MSn) 测定之前,果汁样品中的 G2 和 G2。在超高效液相色谱-离子阱串联质谱 (UHPLC-IT-MSn) 之前,磁性空心双金属锌/钴沸石咪唑骨架作为吸附剂,用于从果汁样品中有效富集黄曲霉毒素 B1、B2、G1 和 G2 的示意图决心。在超高效液相色谱-离子阱串联质谱 (UHPLC-IT-MSn) 测定之前,果汁样品中的 G2 和 G2。在超高效液相色谱-离子阱串联质谱 (UHPLC-IT-MSn) 之前,磁性空心双金属锌/钴沸石咪唑骨架作为吸附剂,用于从果汁样品中有效富集黄曲霉毒素 B1、B2、G1 和 G2 的示意图决心。
更新日期:2020-10-19
down
wechat
bug