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高效毛细管电泳地测定中草药川乌,草乌中乌头碱的含量 总被引:7,自引:0,他引:7
建立了测定有毒中草药川乌和草乌中3种乌头碱的高效毛细管电泳方法,系统地考察了电泳条件对分离的影响,并应用于香港市售川乌及草乌中中乌头碱、次乌头碱和乌头碱的测定,检测限为1.67-2.31mg/L,回收率为93.0-104.0%,相对标准差为0.68-1.70%。 相似文献
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利用X射线衍射(XRD)技术、傅里叶变换红外光谱(FTIR)和Raman光谱对经不同剂量的56Fe13+离子辐照的GaP晶体的微结构进行了表征。结果表明:随着辐照离子剂量的增加,GaP晶体中产生了局部的无序与缺陷。随着56Fe13+离子剂量的增加,Raman光谱展示出振动峰强度逐渐减弱而且一些逐渐消失,但其峰位几乎没有发生变化;XRD显示出GaP晶体的衍射峰的强度逐渐减小;FTIR主要表现为宽化及其强度增加。这表明重离子56Fe13+的辐照使得GaP晶体中的缺陷与无序性增加,导致晶体产生了局部的非晶化。The Misconstructural damage of GaP irradiated with 56Fe13+ to fluences ranging from 1×107 ions/cm2~1×1010 ions/cm2 were analyzed by X-ray diffraction (XRD) techniques, Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy. The result shows that, with the increase of irradiation ion fluences, local disorder and defects were produced in GaP crystal. With the increase of ion fluence, Raman spectra reveal the intensity of scattering peaks gradually weakens and some scattering peaks gradually disappear, however no changes in the peak position were found. XRD measurement displays that the intensity of diffraction peaks gradually decreases with an increase in ions fluences. Result from FTIR spectra exhibits that the intensity of reflection peaks gradually increases and the FWHM of reflection peaks broadens. These phenomena indicate that, the irradiation of heavy-ion Fe produces defects and disorder in GaP crystal, leading to a local amorphization. 相似文献
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本报道了低温振动样品磁强计测量样品磁矩时,样品长度和温度对测量结果的影响,给出了相应的校正曲线,并讲讨论了产生这种影响的物理机理。 相似文献