镓元素双线吸收法测量富氧空气-乙炔火焰的温度  

Measurement of oxygen-air-acetylene flame temperature by gallium double-line atomic absorption method

作　　者：吴少尉[1] 郑晓霞[1] 

机构地区：[1]湖北民族学院化学与环境工程学院,湖北恩施445000

出　　处：《冶金分析》2010年第12期26-29,共4页Metallurgical Analysis

基　　金：国家自然科学基金项目(200871044);湖北民族学院博士启动基金(MY2009B007;MY2009B008)

摘　　要：基于吸光度定义和玻尔兹曼分布,推导了镓元素双线吸收法测量富氧空气-乙炔火焰温度的最简公式。在镓元素的403.30 nm和417.21 nm两线处,分别测量镓标准溶液喷入不同氧气、乙炔流量比的燃烧火焰中的吸光度,代入最简测温公式,获得了富氧空气-乙炔新型高温火焰的温度分布范围,进行适当回归外推后判断富氧空气-乙炔火焰的温度分布范围为2300～2 920 K。比常规空气-乙炔火焰温度(2 070～2 400 K)提升了约300～500 K。In this paper,the simplest formula for measurement of oxygen-air-acetylene flame temperature by gallium double-line absorption method was deduced based on absorbance definition and Boltzmann distribution.At two analytical lines of 403.30 nm and 417.21 nm of gallium,the absorbance of gallium standard solution was measured in combustion flame with different flow rate ratio of oxygen to acetylene,and then substituted into the simplest formula of temperature measurement.As a result,the distribution range of oxygen-air-acetylene flame temperature was obtained.After appropriate regression and extrapolation,the oxygen-air-acetylene flame temperature distribution ranged from 2 300 K to 2 920 K which was 300-500 K higher than that of conventional air-acetylene flame.

关 键 词：富氧空气-乙炔火焰 双线吸收法 温度 镓 

分 类 号：O657.31[理学—分析化学]