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纳米晶Mg-Al水滑石的水热合成及微结构表征 被引量:2
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作者 王永在 《无机化学学报》 SCIE CAS CSCD 北大核心 2007年第6期1055-1058,共4页
水滑石型化合物又称层状双金属氢氧化物(LDHs)或阴离子粘土,具类似于水镁石的层状结构。LDHs层中因部分二价阳离子被三价阳离子替代.使层板带正电荷,层间充填有平衡电荷的有机或无机阴离子以及水分子,
关键词 MG-AL水滑石 纳米晶 水热合成 x-射线全谱拟合法 间层结构
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Determination the content of gypsum fibrosum in Xiaokening tablets by powder X ray diffraction method 被引量:2
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作者 Jianping Zhang Xinxin Feng Dong Wang 《Journal of Chinese Pharmaceutical Sciences》 CAS CSCD 2019年第3期186-194,共9页
The research on the application of X-ray diffraction in the quantitative analysis of Chinese medicines is rare. The main reason is that the technical problems related to the internal standard and the selection of quan... The research on the application of X-ray diffraction in the quantitative analysis of Chinese medicines is rare. The main reason is that the technical problems related to the internal standard and the selection of quantitative peaks are not well solved, and the accuracy and precision of the results are not satisfactory. This study employed the concept of mass absorption coefficient based on the internal standard method, and the full spectrum fitting and quantitative methods were used to solve the above technical problems. The sample was blended. the internal standard substance of zinc oxide was fully ground, and tablets were prepared by positive pressure method. Under certain instrumental conditions, the PXRD pattern was obtained by scanning. The percentage of gypsum fibrosum in Xiaokening tablet was obtained by quantitative analysis of full spectrum fitting internal standard by TOPAS software. The method was investigated by methodology. At the same time, the method was compared by ion chromatography, and SPSS software was used to make a significant t test on the results of the two methods. After the investigation, the average standard recovery rate of CaSO4-2H2O was 99.06%(RSD = 3.02%);and the recovery rate for simulated samples was 96.7%. The method had good specificity. After statistical analysis, there was no significant difference between the new PXRD method and the traditional method of ion chromatography. 展开更多
关键词 Powder X ray diffraction Full spectrum fitting internal standard quantitative method Xiaokening tablet Gypsum fibrosum
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