College of Life Science, Yantai University, Yantai 264005, China.
Anal Methods. 2020 Oct 22;12(40):4906-4912. doi: 10.1039/d0ay01482f.
In this paper, magnetic ZIF-67 composites were prepared by an in situ method and utilized in the magnetic solid-phase extraction of phthalate esters. The obtained magnetic ZIF-67 composites were characterized in detail, and the adsorption performance was evaluated. The results showed that ZIF-67 crystals in the composites had a chamfered cubic shape with about 2.0 μm diameter and Fe3O4 was attached on the surface of ZIF-67. The parameters affecting magnetic solid-phase extraction efficiency were optimized including the adsorption and desorption conditions. Under the optimum conditions, magnetic solid-phase extraction coupled with gas chromatography-mass spectrometry for analyzing seven phthalate esters in environmental water samples was established. All the analytes exhibited good linearity (1-200 ng mL-1) with correlation coefficients higher than 0.9950. The relative standard deviations were between 4.3% and 8.9%. The developed method showed high sensitivity and had good potential for analyzing trace phthalate esters in water samples.
本文采用原位法制备了磁性 ZIF-67 复合材料，并将其用于邻苯二甲酸酯的磁性固相萃取。详细表征了所得磁性 ZIF-67 复合材料，并评价了其吸附性能。结果表明，复合材料中的 ZIF-67 晶体呈具有约 2.0μm 直径的斜方截角八面体形状，Fe3O4 附着在 ZIF-67 的表面。优化了影响磁性固相萃取效率的参数，包括吸附和洗脱条件。在最佳条件下，建立了气相色谱-质谱联用磁固相萃取法分析环境水样中七种邻苯二甲酸酯的方法。所有分析物均表现出良好的线性关系（1-200ngmL-1），相关系数均高于 0.9950。相对标准偏差在 4.3%-8.9%之间。该方法具有较高的灵敏度，在分析水样中的痕量邻苯二甲酸酯方面具有良好的应用潜力。
