摘要
采用具备实现微量元素快速精确在线分析潜力的激光诱导击穿光谱(LIBS)技术,测量气体中微量元素的含量.搭建了LIBS测量气体中微量元素实验系统,以气体中微量元素Hg和I为研究对象,分析了不同激光波长对低压LIBS测量气体中微量元素的影响及其变化规律.结果表明:降低压力能够显著提高LIBS的检测能力;在不同压力时,532nm激光波长的微量元素检测能力均高于1 064nm激光波长.
Laser-induced breakdown spectroscopy （LIBS） was used to measure the trace elements in gas, which has great potential in on-line measurement of trace elements. By setting up a LIBS exprimental sys- tem and taking the trace elements mercury and iodine as the objects of study, the trace elements in gas were measured and analyzed using LIBS under low-pressure and different laser wavelength conditions. Re- sults show that the detection capability of LIBS can be significantly improved by lowering the pressure; at different pressures, the detection capability with laser of wavelength 532 nm for trace elements in gas is stronger than that with laser of wavelength 1 064 nm.
出处
《动力工程学报》
CAS
CSCD
北大核心
2018年第2期127-131,共5页
Journal of Chinese Society of Power Engineering
基金
中国博士后科学基金资助项目(2015M582655)
中央高校基本科研业务费专项资金资助项目(xjj2015032)
关键词
激光波长
压力
激光诱导击穿光谱
微量元素
laser wavelength
pressure
laser-induced breakdown spectroscopy
trace element
