Analysis of lead and copper in soil samples by laser-induced breakdown spectroscopy under external magnetic field

被引：37
作者：
Akhtar, M. [1 ,2 ]
Jabbar, A. [1 ,2 ]
Ahmed, N. [1 ,3 ]
Mahmood, S. [2 ]
Umar, Z. A. [1 ]
Ahmed, R. [1 ]
Baig, M. A. [1 ,3 ]
机构：
[1] Quaid I Azam Univ Campus, Natl Ctr Phys, Islamabad 45320, Pakistan
[2] MUST, Dept Phys, Mirpur 10250, Ajk, Pakistan
[3] Univ Azad Jammu & Kashmir, Dept Phys, Muzaffarabad 13100, Azad Kashmir, Pakistan
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 2019年 / 125卷 / 06期
关键词：
ELEMENTAL ANALYSIS; OPTICAL-EMISSION; PLUME EMISSION; TRACE-ELEMENTS; HEAVY-METALS; PLASMA; ENHANCEMENT; LIBS;
D O I：
10.1007/s00340-019-7225-9
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The purpose of the present study was to improve the detection limits of copper and lead in the soil samples by coupling Laser-Induced Plasma Spectrometry (LIPS) with an external magnetic field. The laser-induced plasma was generated using an Nd:YAG laser (532nm) and the emission spectra were registered using a set of four spectrometers covering the wavelength region from 250 to 870nm. The application of external magnetic field (0.7T) perpendicular to the propagation of the plasma plume increases the plasma temperature, electron density, and plasma emission intensity. This enhancement in the plasma parameters is attributed to the plasma confinement. The detection limit of Pb and Cu has been improved from 12ppm to 4.1ppm and from 3.9ppm to 1.4ppm by applying magnetic field. The plasma temperature and electron number density decays slowly along the plasma expansion axis in the presence of external magnetic field.
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页数：11
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