理化检验-物理分册2026，Vol.62Issue(1)：10-13,4.DOI:10.11973/lhjy-wl250161
扫描电镜能谱分析和红外光谱法对未知试样成分的鉴别方法
Identification method of unknown sample composition by scanning electron microscope energy spectrum analysis and infrared spectroscopy
摘要
Abstract
The unknown white powder samples extracted from a case were analyzed and identified by scanning electron microscopy energy dispersive spectroscopy(SEM-EDS)combined with infrared spectroscopy(FTIR).The elemental composition of the sample was qualitatively and quantitatively analyzed by SEM-EDS technology.It was inferred that the main elements were oxygen,aluminum and sulfur,and the mass fraction ratio of each element was 8∶1∶2.Further combined with the retrieval and comparison of FTIR spectra,it was preliminarily determined that the sample was ammonium alum.In order to verify the reliability of the analysis results,the reaction characteristics of the samples were verified by chemical tests,and the results were consistent with the inference.The results show that the combined use of SEM-EDS and FTIR could efficiently and quickly identify the chemical composition of unknown powder samples.It had the advantages of simple operation and rapid analysis,which could provide scientific basis and technical reference for the analysis of physical evidence in the field of criminal technology.关键词
扫描电镜和能谱分析/红外光谱分析/成分鉴定/铵明矾Key words
scanning electron microscopy and energy spectrum analysis/infrared spectrum analysis/identification of constituent/ammonium alum分类
社会科学引用本文复制引用
王宇,周泽娇,李斌..扫描电镜能谱分析和红外光谱法对未知试样成分的鉴别方法[J].理化检验-物理分册,2026,62(1):10-13,4.基金项目
云南省基础研究项目(202101AU070163) （202101AU070163）
