喇曼谱在检测饮用水中矿物质浓度的研究  

Study of Raman spectrum in detecting mineral substance concentration of drinking water

作　　者：杨昌虎[1] 史向华[1] 刘小兵[1] 廖家欣[1] 

机构地区：[1]长沙理工大学物理与电子科学学院,长沙410076

出　　处：《激光技术》2008年第4期366-369,共4页Laser Technology

基　　金：湖南省教育厅科研基金资助项目(06C104)

摘　　要：为了更有效地检测目前饮用水的质量,对市面上常用的几种品牌的饮用水以及实验室提供的蒸馏水等样品的喇曼谱进行了研究。运用激光喇曼光谱的分析方法,测量了它们的激光喇曼谱在伸缩振动喇曼峰处的半峰全宽,同时也测量了样品在伸缩振动喇曼峰处的退偏振度。结果表明,伸缩振动喇曼峰的半峰全宽随水样品中含有的微量矿物质浓度的增加而减少,而伸缩振动喇曼峰处退偏振度随水样品中含有的微量矿物质浓度增加而增加。该结果为鉴定饮用水的质量提供了一种简单而有效的方法。In order to assay the quality of drinking water, several kinds of brand drinking water on the market and the distilled water offered in the laboratory were studied. By using laser Raman spectrum method, the samples＇ full width at half maximum （FWHM） and depolarization ratio of laser Raman spectrum at stretching vibration were measured. The study showed that as the samples＇ mineral substance concentration increased,its FWHM at stretching vibration decreased, but its depolarization ratio of laser Raman spectrum at stretching vibration increased. This results provides us a simple and effective way to assay the quality of drinking water.

关 键 词：光谱学 饮用水 喇曼光谱 伸缩振动 半峰全宽 退偏振度 

分 类 号：O433.4[机械工程—光学工程]