石膏炮制前后红外光谱的特征分析与鉴定

A Characteristic Analysis and Identification of Gypsum Fibrosum and Gypsum Fibrosum Preparatum by Infrared Spectroscopy

目的:比较石膏炮制前后的红外光谱特征差异,分析其化学组成的变化规律。方法:运用红外光谱技术,对不同产地生石膏及煅石膏进行分析。结果:来自11个不同产地生石膏的红外光谱图相似度可达到96%以上;炮制前后的石膏红外光谱图有明显差异。结论:红外光谱技术可以用于炮制前后石膏的鉴别和质量控制。

Objective To compare with the infrared spectrum character difference of gypsum fibrosum crystal and gypsum fibrosum prepaxatum and analysis the changing rules of gypsum＇ s chemical composition after processing. Methods Infrared spectrum of the gypsum and its processing products from different producing areas was studied by infrared spectrum analysis. Results The comparability of gypsum from 11 different producing areas can get over 95 %. The difference of infrared spectrum of gypsum after processing is apparent. Conclusion Infrared spectrum technique provided a rapid, simple and convenient method for the quality control and discrimination of gypsum and calcined gypsum.