Detection of Heavy Metals in Soil Based on Polarization Resovled LIBS Technique

Table 1. Soil samples contained different concentrations of Pb
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Table 1. Soil samples contained different concentrations of Pb
Serial number of soil sample Mass fraction /10^-6
1 100
2 200
3 300
4 400
5 500
6 600
7 700
8 800
9 900

Table 2. Polarization degree of four characteristic spectral lines and corresponding continuous background radiation

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Table 2. Polarization degree of four characteristic spectral lines and corresponding continuous background radiation

Characteristicspectralline /nm	Polarizationdegree	Continuousbackgroundradiation /nm	Polarizationdegree
Fe Ⅰ: 404.581	0.27	403.5-404.0	0.70
Pb Ⅰ: 405.780	0.17	405.0-405.4	0.64
Ca Ⅰ: 422.670	0.25	421.0-421.4	0.69
Mg Ⅰ: 518.361	0.23	517.7-518.0	0.67

Table 3. SBR of four characteristic spectral lines under the conditions of polarization and non-polarization
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Table 3. SBR of four characteristic spectral lines under the conditions of polarization and non-polarization
Condition SBR
Fe Ⅰ: 404.581 nm Pb Ⅰ: 405.780 nm Ca Ⅰ: 422.670 nm Mg Ⅰ: 518.361 nm
Polarization 3.28 3.88 9.33 2.62
Non-polarization 18.33 21.99 49.43 19.25

Table 4. Limit of detection of Pb under the conditions of polarization and non-polarization
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Table 4. Limit of detection of Pb under the conditions of polarization and non-polarization
Condition k S_B c_L /10^-6
Polarization 1.43 18.8 39.4
Non-polarization 1.93 11.2 17.4

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Yu Yang, Zhao Nanjing, Meng Deshuo, Ma Mingjun, Lan Zhigao. Detection of Heavy Metals in Soil Based on Polarization Resovled LIBS Technique[J]. Chinese Journal of Lasers, 2018, 45(8): 811001

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Paper Information

Category: spectroscopy

Received: Jan. 31, 2018

Accepted: --

Published Online: Aug. 11, 2018

The Author Email:

DOI:10.3788/CJL201845.0811001

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Soil samples contained different concentrations of Pb

Table 1. Soil samples contained different concentrations of Pb

Table 2. Polarization degree of four characteristic spectral lines and corresponding continuous background radiation

Table 2. Polarization degree of four characteristic spectral lines and corresponding continuous background radiation

Table 3. SBR of four characteristic spectral lines under the conditions of polarization and non-polarization

Table 3. SBR of four characteristic spectral lines under the conditions of polarization and non-polarization

Table 4. Limit of detection of Pb under the conditions of polarization and non-polarization

Table 4. Limit of detection of Pb under the conditions of polarization and non-polarization