X-射线粉末衍射K值法对不同厂家滑石粉的纯度考察

Study on the Purity of Talci Pulvis from Different Manufacturers Through K-Value Method of PXRD

本文从定性和定量两个方面对4个厂家滑石粉的纯度进行了考察.首先通过X-射线粉末衍射法(PXRD)、扫描电子显微镜(SEM)和傅立叶变换红外光谱(FT-IR)对4个厂家的滑石粉进行了定性鉴定,然后利用X-射线粉末衍射K值法计算出待测样品中滑石粉[Mg_3(Si_4O^(10))(OH)_2]的百分含量,进而推算出Mg元素的百分含量.分析结果表明,4个厂家滑石粉含量均大于90%,Mg的百分含量在17.0%～19.5%,均符合中国药典的规定,其中D厂家滑石粉的纯度最高,质量更好,其余依次为C、A、B.本实验结果为生产企业根据实际需要选用滑石粉提供了参考数据.

In this paper,we investigated the purity of Talci Pulvis from four manufacturers,both qualitatively and quantitatively.Firstly,the property of Talci Pulvis from four manufactures was investigated by PXRD,SEM and FT-IR,and percentage composition of talci and magnesium in Talci Pulvis were determined by K-Value method of PXRD.The results showed that Talci Pulvis from four manufactures,all conform to the rules,and the Talci Pulvis from D manufacturer has superior quality,which provides a reference for the production enterprises to select Talci Pulvis according to the actual needs.