利用荧光胺与盐酸美西律的芳伯胺基生成高度荧光衍生物,检测盐酸美西律片盐酸美西律的含量。实验表明荧光胺与盐酸美西律的芳伯胺基生成的荧光衍生物的最大激发波长为397nm,最大发射波长为387nm。利用L9(34)正交试验确定了最佳衍生条件:反应温度25℃,反应时间20min,衍生剂加入量2.60 m L。盐酸美西律含量在0.0160μg·m L^(-1)~0.800μg·m L^(-1)的浓度范围内与相对荧光强度存在线性关系,线性方程为y=3809.4x+2024.1,线性相关系数为0.998,此法可用于检测盐酸美西律片盐酸美西律的含量。
A series of Zr-doped CaTiO3 powders were prepared with the mild co-precipitation method and calcined at 850℃ for 3 h. The as-prepared Zr-doped CaTiO3 samples were characterized by scanning electron microscopy （SEM）...
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A series of Zr-doped CaTiO3 powders were prepared with the mild co-precipitation method and calcined at 850℃ for 3 h. The as-prepared Zr-doped CaTiO3 samples were characterized by scanning electron microscopy （SEM）, X-ray diffraction （XRD）, UV-Vis diffuse reflectance spectra （DRS） and X-ray photoelectron spectra （XPS）. XRD result revealed the presence of single perovskite phase of CaTiO3. UV-Vis diffusive reflection spectra of Zr-doped CaTiO3 indicated that the absorbance obviously increased in the visible light irradiation. XPS analysis showed that two types of oxygen existed on the photocatalyst surface, including lattice oxygen and absorbed oxygen. Their photocatalytic activity in the case of the degradation of methyl orange in water and photoelectrochemical activity were also tested. The 5%Zr-doped （mole fraction） CaTiO3 sample showed the highest photocatalytic activity. The enhanced photocatalytic activity was ascribed to the change of the lattice structure, existence of oxygen vacancies and increase of the photogenerated charge separation efficiency.
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