Signal enhancement of the laser-induced plasma in the soil mixed with carbon  

作　　者：ZHANG QiuLin ZHANG JinPing ZHANG Lei LI Xu GUO QingLin FU GuangSheng 

机构地区：[1]Hebei Key Laboratory of Optoelectronic Information Materials, Hebei University, Baoding 071002, China

出　　处：《Chinese Science Bulletin》2010年第4期386-389,共4页

基　　金：supported by the Post Doctorate Foundation of Hebei Univer-sity and Natural Science Foundation of Hebei Province (Grant No. A 2008000565)

摘　　要：An experimental investigation of the carbon concentration effects on the emission intensity has been carried out using laserinduced plasma spectroscopy. The results show that the intensity of Ca II 393.367 nm and 396.847 nm characteristic lines emitted in the sample with the carbon concentration of 25% is about five times larger than that in the pure soil sample. It can be attributed to the high heat transfer coefficient and low ionization potentials of carbon in the system. Using the best experimental condition, quantitative analysis of the trace element of lead is conducted and the detection limit of lead concentration is estimated to be below 0.02%.An experimental investigation of the carbon concentration effects on the emission intensity has been carried out using laser- induced plasma spectroscopy. The results show that the intensity of Ca II 393.367 nm and 396.847 nm characteristic lines emitted in the sample with the carbon concentration of 25% is about five times larger than that in the pure soil sample. It can be attributed to the high heat transfer coefficient and low ionization potentials of carbon in the system. Using the best experimental condition, quantitative analysis of the trace element of lead is conducted and the detection limit of lead concentration is estimated to be below 0.02%.

关 键 词：激光等离子体 土壤碳 信号增强 混合 等离子体光谱 土壤样品 排放浓度 实验条件 

分 类 号：O614.31[理学—无机化学] TN241[理学—化学]