摘要
激光诱导击穿光谱(LIBS)作为一项很有前景的元素分析技术,具有原位测量、远程监控等优势,而对蚊香样品的LIBS检测应用是一项较新的课题。为将LIBS技术实际应用于环境监测领域,实验中利用时间分辨的激光诱导击穿光谱技术对蚊香样品的激光等离子体光谱进行了测量和分析,确定出蚊香中Al、Mn、Mg、Sr、Zn、Ba、Na、Ca、Fe、Si和H的11种元素成分;基于等离子体局域热动力学平衡模型,计算了等离子体温度。利用自由定标分析方法计算了上述元素的相对含量。实验结果表明激光诱导击穿光谱技术可以用于有害元素的快捷有效检测。
Laser-induced breakdown spectroscopy（LIBS） has been used as a promising element analysis technique with the advantages of in-situ detection and remote monitoring etc. It is a relatively new task to apply LIBS to mosquito coil sample. In order to apply LIBS technique in the field related to environmental monitoring, we use time-resolved LIBS to measure and analyze mosquito coil sample. Eleven kinds of elemental composition of mosquito coil, which are A1, Mn, Mg, St, Zn, Ba, Na, Ca, Fe, Si and H, are identified. Based on local thermodynamic equilibrium （LTE） assumption, the plasma temperature is obtained. The relative concentrations of these elements are estimated by calibration-free method. The experimental result prove that LIBS can be applied to the rapid and effective detection on the harmful elements.
出处
《激光与光电子学进展》
CSCD
北大核心
2014年第3期182-188,共7页
Laser & Optoelectronics Progress
基金
国家自然科学基金(11274254
91126007
11364037
11064012)
关键词
光谱学
激光诱导击穿光谱
局域热动力学平衡
蚊香元素成分
spectroscopy
laser-induced breakdown spectroscopy
local thermodynamic equilibrium
elemental composition of mosquito coil
