Simple ultraviolet–visible spectroscopy-based methodology was proposed and utilized for the initial characterization of potential changes in selectivity of doped magnetic nanoparticles. Doped and undoped iron(II,III) (Fe₃O₄) magnetic nanoparticles were synthesized by the coprecipitation method. The doping processes of nanoparticles were confirmed using optical emission spectrometry, while the sizes of undoped and Cu-doped nanoparticles were investigated using a high-resolution field emission scanning electron microscope. The average diameters of nanoparticles were 8.34±1.78 nm and 9.12±1.93 nm, for doped and undoped materials, respectively. The influence of the nanoparticle's doping on their selectivity towards chosen analyte was monitored by the spectral techniques such as ultraviolet–visible and optical emission spectrometry. The interaction between Cu-doped Fe₃O₄ nanoparticles and cuprizone (a compound forming the characteristic colorful complex with copper) was confirmed. The elaborated studies proved the potential of ultraviolet–visible spectroscopy for the fast qualification of magnetic nanoparticles in terms of their ability to separate the selected analyte from the sample matrix.

提出了基于简单紫外-可见光谱的方法并将其用于掺杂磁性纳米粒子选择性潜在变化的初步表征。掺杂和未掺杂的铁 (II,III) (Fe ₃ O ₄) 磁性纳米粒子是通过共沉淀法合成的。纳米粒子的掺杂过程使用光学发射光谱法证实，而未掺杂和铜掺杂纳米粒子的尺寸则使用高分辨率场发射扫描电子显微镜进行研究。对于掺杂和未掺杂材料，纳米颗粒的平均直径分别为 8.34±1.78 nm 和 9.12±1.93 nm。纳米颗粒的掺杂对其对选定分析物的选择性的影响通过光谱技术（如紫外-可见光和光发射光谱法）进行监测。Cu掺杂Fe ₃ O ₄之间的相互作用纳米颗粒和铜宗（一种与铜形成特征性多彩复合物的化合物）得到证实。详细的研究证明了紫外-可见光谱在磁性纳米粒子从样品基质中分离选定分析物的能力方面具有快速鉴定的潜力。