Quantitative Detection of Nutrient Elements in Soil Based on Laser Induced Breakdown Spectroscopy

Wang Jinmei; Yan Haiying; Zheng Peichao; Tan Guining

doi:10.3788/CJL201744.1111002

Chinese Journal of Lasers, Volume. 44, Issue 11, 1111002(2017)

Quantitative Detection of Nutrient Elements in Soil Based on Laser Induced Breakdown Spectroscopy

Wang Jinmei, Yan Haiying, Zheng Peichao^*, and Tan Guining

Author Affiliations

[in Chinese]

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Figures & Tables(10)

Fig. 1. (a) Traditional LIBS system and (b) LIBS system with cage structure

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Fig. 2. Variation curves of signal intensity of Mg II 279.56 nm, Mg II 280.26 nm, and Mg I 285.21 nmspectral lines at different focusing positions

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Fig. 3. Plasma images at different focusing positions

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Fig. 4. Stability of Mg II 279.56 nm, Mg II 280.26 nm, and Mg I 285.21 nm spectral lines in traditional LIBS system

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Fig. 5. Stability of Mg II 279.56 nm, Mg II 280.26 nm, and Mg I 285.21 nm spectral lines in LIBS system with cage structure

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Fig. 6. Calibration curves for different elements. (a) Copper element; (b) manganese element; (c) magnesium element; (d) potassium element

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Table 1. Mass fractions of Cu, Mn, Mg and K elements in soil samples10-6

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Table 1. Mass fractions of Cu, Mn, Mg and K elements in soil samples10-6

Number	Cu	Mn	Mg	K	Number	Cu	Mn	Mg	K
1	24.6	677.0	15300.0	17600.0	9	44.2	863.0	16100.0	18933.3
2	54.0	956.0	16500.0	19600.0	10	22.5	703.0	13140.0	19950.0
3	18.3	755.0	8820.0	24650.0	11	20.4	729.0	10980.0	22300.0
4	39.3	816.5	15900.0	18600.0	12	42.1	889.0	13940.0	21283.3
5	21.5	716.0	12060.0	21125.0	13	34.4	770.0	15700.0	18266.7
6	36.2	855.5	12660.0	22125.0	14	30.4	766.3	13980.0	19862.5
7	32.3	796.0	13540.0	20616.7	15	37.7	836.0	14280.0	20362.5
8	30.2	822.0	11380.0	22966.7	16	28.8	785.8	12360.0	21625.0

Table 2. Actual laser pulse energy for 20 timesmJ
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Table 2. Actual laser pulse energy for 20 timesmJ
Number Energy Number Energy Number Energy Number Energy Number Energy
1 50.5 5 51.9 9 51.1 13 50.6 17 49.6
2 50.8 6 48.9 10 50.6 14 51.5 18 50.5
3 51.6 7 49.6 11 51.0 15 50.0 19 48.9
4 49.6 8 51.3 12 52.0 16 50.2 20 49.6

Table 3. Detection limits of Cu, Mn, Mg and K elements obtained by LIBS system with cage structure and traditional LIBS system(mass fraction)10-6
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Table 3. Detection limits of Cu, Mn, Mg and K elements obtained by LIBS system with cage structure and traditional LIBS system(mass fraction)10-6
Element Cu Mn Mg K
LIBS system with cage structure 0.42 13.2 38.5 62
Traditional LIBS system 10.58 145.25 56.2 80.56

Table 4. Predicted mass fractions and relative errors of Cu, Mn, Mg, K elements in soil samples

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Table 4. Predicted mass fractions and relative errors of Cu, Mn, Mg, K elements in soil samples

Number	Predicted mass fraction /10^-6				Relative error /%
Number	Cu	Mn	Mg	K	Cu	Mn	Mg	K
9	48.1	1021.3	17363.5	17170.8	8.1	15.5	7.3	10.3
10	22.9	623.7	14219.0	21741.6	1.6	12.7	7.6	8.2
11	21.5	737.2	12265.4	25488.5	5.2	1.1	10.5	12.5
12	48.0	1005.2	15681.0	23653.9	12.3	11.6	11.1	10.0
13	39.2	891.1	16531.0	20979.2	12.3	13.6	5.0	12.9
14	33.6	694.0	15385.9	21978.3	9.7	10.4	9.1	9.6
15	42.0	838.0	15934.7	22784.5	10.2	0.2	10.4	10.6
16	33.5	705.	13246.5	24883.0	13.9	11.4	6.7	13.1

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Wang Jinmei, Yan Haiying, Zheng Peichao, Tan Guining. Quantitative Detection of Nutrient Elements in Soil Based on Laser Induced Breakdown Spectroscopy[J]. Chinese Journal of Lasers, 2017, 44(11): 1111002

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Paper Information

Category: Spectroscopy

Received: Jun. 20, 2017

Accepted: --

Published Online: Nov. 17, 2017

The Author Email: Peichao Zheng (Zhengpc@cqupt.edu.cn)

DOI:10.3788/CJL201744.1111002

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Mass fractions of Cu, Mn, Mg and K elements in soil samples10-6

Table 1. Mass fractions of Cu, Mn, Mg and K elements in soil samples10-6

Table 2. Actual laser pulse energy for 20 timesmJ

Table 2. Actual laser pulse energy for 20 timesmJ

Table 3. Detection limits of Cu, Mn, Mg and K elements obtained by LIBS system with cage structure and traditional LIBS system(mass fraction)10-6

Table 3. Detection limits of Cu, Mn, Mg and K elements obtained by LIBS system with cage structure and traditional LIBS system(mass fraction)10-6

Table 4. Predicted mass fractions and relative errors of Cu, Mn, Mg, K elements in soil samples

Table 4. Predicted mass fractions and relative errors of Cu, Mn, Mg, K elements in soil samples