Accurate method based on data filtering for quantitative multi-element analysis of soils using CF-LIBS  

作　　者：韩伟伟 孙对兄 张国鼎 董光辉 崔小娜 申金成 王浩亮 张登红 董晨钟 苏茂根 Weiwei HAN;Duixiong SUN;Guoding ZHANG;Guanghui DONG;Xiaona CUI;Jincheng SHEN;Haoliang WANG;Denghong ZHANG;Chenzhong DONG;Maogen SU(Key Laboratory of Atomic and Molecular Physics&Functional Material of Gansu Province,College of Physics and Electronic Engineering,Northwest Normal University,Lanzhou 730070,People’s Republic of China;Gansu Digital Herb Testing Center,Dingxi 743000,People’s Republic of China;Gansu International Scientific and Technological Cooperation Base of Laser Plasma Spectroscopy,Lanzhou 730070,People’s Republic of China)

机构地区：[1]Key Laboratory of Atomic and Molecular Physics&Functional Material of Gansu Province,College of Physics and Electronic Engineering,Northwest Normal University,Lanzhou 730070,People’s Republic of China [2]Gansu Digital Herb Testing Center,Dingxi 743000,People’s Republic of China [3]Gansu International Scientific and Technological Cooperation Base of Laser Plasma Spectroscopy,Lanzhou 730070,People’s Republic of China

出　　处：《Plasma Science and Technology》2024年第6期149-158,共10页等离子体科学和技术（英文版）

基　　金：supported by the Major Science and Technology Project of Gansu Province(No.22ZD6FA021-5);the Industrial Support Project of Gansu Province(Nos.2023CYZC-19 and 2021CYZC-22);the Science and Technology Project of Gansu Province(Nos.23YFFA0074,22JR5RA137 and 22JR5RA151).

摘　　要：To obtain more stable spectral data for accurate quantitative analysis of multi-element,especially for the large-area in-situ elements detection of soils, we propose a method for a multielement quantitative analysis of soils using calibration-free laser-induced breakdown spectroscopy(CF-LIBS) based on data filtering. In this study, we analyze a standard soil sample doped with two heavy metal elements, Cu and Cd, with a specific focus on the line of Cu I324.75 nm for filtering the experimental data of multiple sample sets. Pre-and post-data filtering,the relative standard deviation for Cu decreased from 30% to 10%, The limits of detection(LOD)values for Cu and Cd decreased by 5% and 4%, respectively. Through CF-LIBS, a quantitative analysis was conducted to determine the relative content of elements in soils. Using Cu as a reference, the concentration of Cd was accurately calculated. The results show that post-data filtering, the average relative error of the Cd decreases from 11% to 5%, indicating the effectiveness of data filtering in improving the accuracy of quantitative analysis. Moreover, the content of Si, Fe and other elements can be accurately calculated using this method. To further correct the calculation, the results for Cd was used to provide a more precise calculation. This approach is of great importance for the large-area in-situ heavy metals and trace elements detection in soil, as well as for rapid and accurate quantitative analysis.

关 键 词：laser-induced breakdown spectroscopy SOIL data filtering quantitative analysis multielement 

分 类 号：O657.319[理学—分析化学] S151.9[理学—化学]