Microchimica Acta ( IF 5.3 ) Pub Date : 2021-09-12 , DOI: 10.1007/s00604-021-05004-8 Shengrui Xu 1 , Panlong Dong 1 , Ming Qin 2 , Hailin Liu 1 , Anying Long 3 , Changpo Chen 1 , Suling Feng 1 , Hongjing Wu 2
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Core-shell structured Fe2O3/CeO2@MnO2 microspheres were fabricated and used as solid-phase microextraction coating for determination of polycyclic aromatic hydrocarbons (PAHs) in water samples. XPS spectra demonstrated the generation of abundant surface oxygen on Fe2O3/CeO2@MnO2 microspheres, which provided binding sites for enhancement of analyte extraction. Under optimized conditions, the proposed method presented good linearity in the concentration range 0.04–100 ng mL−1, with low limits of detection varying from 0.38 to 3.57 ng L−1 for eight PAHs. Relative standard deviations for a single fiber and five batches of fibers were in the ranges of 4.1–8.2% and 7.1–11.4%, respectively. The proposed method was successfully used for determination of PAHs in real river water samples with recoveries ranging from 87.1 to 115.9%. The proposed method using as-prepared Fe2O3/CeO2@MnO2 microspheres as SPME coating exhibit significant potential for real sample analysis due to its excellent reproducibility, high sensitivity, and good linearity.
Graphical abstract
中文翻译：
具有丰富表面氧的核壳结构的 Fe2O3/CeO2@MnO2 微球用于从水中灵敏固相微萃取多环芳烃
制备了核壳结构的 Fe 2 O 3 /CeO 2 @MnO 2微球，并将其用作固相微萃取涂层，用于测定水样中的多环芳烃 (PAH)。XPS 光谱表明在 Fe 2 O 3 /CeO 2 @MnO 2微球上产生了丰富的表面氧，这为增强分析物提取提供了结合位点。在优化条件下，所提出的方法在 0.04–100 ng mL -1的浓度范围内表现出良好的线性，低检测限在 0.38 到 3.57 ng L -1 之间变化八种多环芳烃。单根纤维和五批纤维的相对标准偏差分别在 4.1-8.2% 和 7.1-11.4% 的范围内。所提出的方法已成功用于测定实际河水样品中的多环芳烃，回收率范围为 87.1% 至 115.9%。所提出的方法使用制备的 Fe 2 O 3 /CeO 2 @MnO 2微球作为 SPME 涂层，由于其优异的重现性、高灵敏度和良好的线性，在实际样品分析中表现出巨大的潜力。
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