摘要
When measured by laser induced breakdown spectroscopy, the characteristic parameters of the plasma fluctuate significantly with the experimental parameters, which would have a greater impact on the quantitative measurement. The effects of two experimental parameters, lens to sample distance(LTSD) and delay time, on plasma temperature and electron density were analyzed. Thereafter the optimal LTSD and delay time for quantitative analysis of Pb and Ni in soil were identified. Two element calibration curves were calculated by the internal standard method under the optimal LTSD and delay time. About the two elements, correlation coefficient of the calibration curves is above 0.993. The maximum relative standard deviation(RSD) were 4.47% and 4.76%, respectively, and the maximum relative errors were 12% and 4.8%, respectively. The experimental results showed that laser induced breakdown spectroscopy method in combination with plasma characteristic parameter analysis shows the advantage on quantitative analysis of heavy metals in soil.
作者
LI Hong-lian
WANG Hong-bao
HUANG Yi-chen
KANG Sha-sha
FU Shi-jie
LI Hao-ran
FANG Li-de
LI Xiao-ting
李红莲;王红宝;黄一宸;康沙沙;付士杰;李浩然;方立德;李小亭(College of Quality and Technology Supervising,Hebei University,Baoding 071000,China;National and Local Joint Engineering Center of Measuring Instruments and Metrology Systems,Baoding 071000,China;College of Chemistry and Environmental Science,Hebei University,Baoding 071000,China;College of Optical Sciences,University of Arizona,Tucson 85721,America)
基金
supported by the Key Projects of Natural Science Foundation of Hebei Province(No.E2017201142)
the 2018 Ministry of Education"Chunhui Program"Cooperative Scientific Research Projects
the Postdoctoral Research Projects in Hebei Province(No.B2016003008)
the Hebei Provincial Natural Science Youth Fund(No.D2012201115).
