文献类型： 外文期刊

作者： Han, Peng-Cheng ¹ ; Yang, Kun ² ; Jiao, Lei-Zi ³ ; Li, Hua-Chang ² ;

作者机构： 1.Univ Sci & Technol Beijing, Dept Chem & Chem Engn, Beijing, Peoples R China

2.BGRIMM Technol Grp, Beijing, Peoples R China

3.Beijing Acad Agr & Forestry Sci, Res Ctr Intelligent Equipment, Beijing, Peoples R China

关键词： LIBS; potassium in soil; matrix effect; laser ablation-assisted; field

期刊名称：FRONTIERS IN CHEMISTRY （ 影响因子：5.545； 五年影响因子：5.869 ）

ISSN： 2296-2646

年卷期： 2022 年 10 卷

页码：

收录情况： SCI

摘要： A fast quantitative analysis method of soil potassium based on direct-focused laser ablation-laser induced breakdown spectroscopy (direct-focused LA-LIBS) was proposed and tested. A high single-pulse energy laser (200 mJ/pulse) beam was focused on the aerosols near the focus of the 10 kHz fiber laser to generate plasma spectra, and the analytical capability of the direct-focused LA-LIBS system was compared with traditional LIBS system using a high single-pulse energy laser (SP-LIBS). The result showed that for moist soil samples the data stability of the direct-focused LA-LIBS method was significantly improved and the R-2 factor of the calibration curve improved from 0.64 to 0.93, the limit of detection improved from 159.2 mu g/g to 140.9 mu g/g. Three random soil samples from different areas of Beijing suburbs were analyzed by the direct-focused LA-LIBS method, and the results were consistent with AAS. The direct-focused LA-LIBS method proposed is different from the traditional double-pulse technology and laser ablation-assisted technology because it not only does not need carrier gas, but also can overcome the matrix differences better, especially the influence of moisture, which provides a new idea for the rapid detection of nutrient elements in field soils.