电感耦合等离子体质谱结合红外光谱与X射线光谱的蒙药磁石质量控制方法研究

通过不同方法探究蒙药磁石的物质组成并对其进行元素含量分析。采用傅里叶变换红外光谱法(FTIR)和X射线衍射法(XRD)对不同厂家的10批次磁石样品进行指纹图谱测定;采用电感耦合等离子体质谱(ICP-MS)测定磁石所含的元素,进一步确定蒙药磁石的物质组成。结果表明,红外光谱中共有7个特征峰,468 cm-1、526 cm-1处分别为石英与四氧化三铁的特征吸收峰;XRD实验确定了9个特征峰,认定磁石指纹谱中5、7、8、9号共有峰数据与Fe3O4相符,3、4号共有峰数据与SiO2相符;通过ICP-MS法确定磁石药材中含有24种元素并测定其含量。其中Fe的含量最高,重金属及有害元素也有检出。FTIR、XRD、ICP-MS可用于磁石的结构鉴定,实验结果为磁石的质量分析奠定了基础。

Experimental Techniques and MethodsStudy on a Quality Control Method for Mongolian Medicine Magnetite Based on Inductively Coupled Plasma Mass Spectrometry Combined with Infrared Spectroscopy and X-ray Diffraction

Several methods were employed to explore the composition of Mongolian medicine magnetite.Fourier transform infrared spectroscopy(FTIR) and X ray diffraction(XRD) were used to determine the spectra of 10 batches of sample from different manufacturers,while elements in magnetite were quantified by inductively coupled plasma mass spectrometry(ICP-MS).Therefore,seven characteristic peaks were found in the infrared spectra for the magnetite,and the characteristic absorption peaks for quartz and Fe3O4 were at 468 cm-1 and 526 cm-1,respectively.Nine characteristic peaks were detected in XRD experiment.The data of peak 5,7,8 and 9 in the spectrum for magnetite were consistent with those of Fe3O4,while the data of the peak 3 and 4 were consistent with those of SiO2.Meanwhile,ICP-MS was used to quantify 24 elements in magnetite.Results showed that the content of Fe was found to be the highest,and other heavy metals and harmful elements were also detected.FTIR,XRD and ICP-MS could be used to identify the structure of magnetite,which lays a foundation for the quality analysis of magnetite.