文档介绍：JIANGXI AGRICULTURAL UNIVERSITY
本科毕业论文(设计)
题目: 水质重金属激光在线检测仪设计
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指导教师
二0 一四年四月
摘要
随着现代社会的发展,水质重金属污染越来越严重,给生态环境和人类健康造成很大危害,因此,对水质重金属污染物进行快速定量检测意义重大。而常规的水质重金属检测方法如原子光谱法、紫外-可见分光光度法、质谱法、电化学分析法、基于QCM技术的检测方法、基于纳米材料的检测方法等,这些方法虽然检测灵敏度高,但存在分析复杂、分析周期长等问题,不能进行实时在线和多元素同时测量。而采用激光诱导击穿光谱(LIBS)技术对水质重金属污染物进行快速定量分析的新方法。LIBS技术是一种基于原子发射光谱定性和定量的分析技术,具有分析周期短、结构简单、对分析对象破坏小、远距离非接触式分析及可多元素同步分析等特点,能适应各种恶劣环境,可实现实时在线检测,对实时监测环境质量有重大意义,在各大领域已展现了其巨大的应用潜力。
本设计是江西农业大学工学院生物光电实验室的水质重金属激光在线检测仪的要求而设计的,主要是为检测系统提供机械装置,使其适应实验室内实验,并且可以在实验室移动。本装置主要包括运动部分和工作部分,运动装置部分是用平机螺栓以及T型螺母将工业万向车轮固定与框架结构上。工作装置部分,是由水泵、橡胶水管、安全阀和调速阀联接而成,保证工作部分水压过大时不会损坏工作部件和水的循环使用。
关键字:LIBS(激光诱导击穿光谱)技术;重金属
Abstract
With the development of modern society, the water heavy metal pollution is ing more and more seriously,which has direct influence on the ecological environment and human , rapid quantitative detection the water metal pollutants in the soil is of great mon heavy metal detection methods such as Atomic spectroscopy, UV Vis spectrophotometry, mass spectrometry, electrochemical analysis, detection method based on QCM technology, detection method based on Nanometer materials and so methods have a number of weaknesses such plicated analysis,a longer analyzing cycle,poor real-time measurement and long cycle analyzing and so on. this paper raised a method which rapid and quantitative analysis of heavy metal pollution in water using laser induced breakdown spectroscopy (LIBS). LIBS is a qualitative and quantitative analytic technology based on atomic emission spectrum which has many advantages such as a shorter analyzing cycle,simple structure,little damage to the analysis objects, non-contact analysis over a long distance and multielement analyzing simultaneously,’s adaptive to various bad environments, available to real-time online detection which is of considerable significance in Real-time monitoring of the environmental quality as well as in other