关键词: font-size:medium, ">滑石粉；粉末X射线衍射；物相鉴定

Abstract: Objective： To establish a new identification method of talcum powder. Methods： Analyzed two batches of qualified samples， two batches of disqualified samples and one batch of counterfeit by the powder X - ray diffraction and do methodological survey. Application of Origin8.0 data analysis software to process the obtained patterns.Peaksearchandphase identification by X′PertHighScore Plus and PDF card library on the sample XRD patterns. Results： The XRD patterns of the two batches of qualified samples were consistent with the threestrong peaks of talcum provided by ICDD (International Diffraction Data Center). The batch of counterfeit were consistent with CaCO3 XRD patterns. In addition to the threestrong peaks of talc，the peaks of NO. 4 and NO.5 are consistent with the characteristics of dolomite and magnesite XRD patternsof two batches of disqualified samples.Precision， stability and reproducibility of RSD were less than 2%by methodological survey. The above results are consistent with the results of phase identification. Conclusion： The application of X-ray diffraction analysis of talc powder composition is specificity， accurate， fast， simple and good reproducibility， it can be used for talc powder quality control and identification. 
    

Key words: font-size:medium, ">Talc powder； Powder X-ray diffraction； Phase identification