摘要
基于物理吸附原理,采用硅藻土和碱性染料(亚甲基蓝、藏红T)制备新型手印显现粉末。利用扫描电子显微镜和傅里叶变换红外光谱表征硅藻土的形貌与结构,通过紫外可见吸收光谱测试硅藻土对碱性染料的吸附性能,使用制得的复合粉末显现出不同客体表面的手印。该综合化学实验涉及多个领域,包括分析化学的数据处理和仪器使用、物理化学的表面吸附机理、法庭科学的手印显现与提取,有利于拓展学生的科学视野,提升学生的科学素养。
Composite powders for developing latent fingermarks were prepared based on physical absorption between diatomite and basic dyes including methylene blue and safranine T. Morphology and structure of diatomite were characterized by SEM and FTIR, respectively. Adsorption property of diatomite was measured by UV-Vis absorption spectra. Fingermarks on various objects were successfully developed by basic dye-diatomite composite powders. This comprehensive chemical experiment covered a set of areas including data processing and equipment use in analytical chemistry,surface adsorption mechanism in physical chemistry, and latent fingermark development in forensic science, which would broaden s*tudents horizon and enhance their scientific literacy.
作者
袁传军
YUAN Chuan-Jun(Department of Trace Examination, Criminal Investigation Police University of China, Shenyang 110035,China;Key Laboratory of Impression Evidence Examination and Identification Technology, Ministry of Public Security, Shenyang 110035 , China)
出处
《化学教育（中英文）》
CAS
北大核心
2019年第6期66-70,共5页
Chinese Journal of Chemical Education
基金
国家自然科学基金(21802169)
公安部科技强警基础工作专项项目(2018GABJC09)
辽宁省博士科研启动基金指导计划项目(20170520204)
中国刑事警察学院博士科研启动金(D2017018)
关键词
法庭科学
手印
碱性染料
硅藻土
研究型教学
forensic science
fingermark
basic dye
diatomite
research-oriented teaching
