Quantitative Analysis of Magnesium and Titanium Elements in Aluminum Alloy by Handheld Laser-Induced Breakdown Spectroscopy

Jingyu Li; Kuan Chen; Guofei Chen; Yangyan Li; Aijun Zeng; Yu Xin

doi:10.3788/LOP56.023002

Laser & Optoelectronics Progress, Volume. 56, Issue 2, 023002(2019)

Quantitative Analysis of Magnesium and Titanium Elements in Aluminum Alloy by Handheld Laser-Induced Breakdown Spectroscopy

Jingyu Li¹, Kuan Chen², Guofei Chen², Yangyan Li¹, Aijun Zeng², and Yu Xin^1、*

Author Affiliations

¹ School of Electronic and Optical Engineering, Nanjing University of Science and Technology,Nanjing, Jiangsu 210094, China

² Nanjing Institute of Advanced Laser Technology, Nanjing, Jiangsu 210038, China

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Figures & Tables(12)

Fig. 1. Schematic of optical path structure in handheld LIBS. (a) Path diagram of excitation light; (b) path diagram of signal light

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Fig. 2. Ray trace image simulated by ZEMAX

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Fig. 3. Experimental setup

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Fig. 4. Spectrogram. (a) Original signal spectrum; (b) processed signal spectrum

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Fig. 5. Spectrum of standard sample E111

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Fig. 6. Calibration curves of Mg element at 383.83 nm and 285.17 nm characteristic lines

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Fig. 7. Calibration curves of Ti element at 323.38 nm and 336.12 nm characteristic lines

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Table 1. Structural parameters of lens

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Table 1. Structural parameters of lens

No.	Type	Radius /mm	Thickness /mm	Glass
1	Standard	Infinity	20
2	Tilt	Infinity	50	K9
3	Standard	24.628	-26.701	Mirror
4	Standard	53.145	56.520	Mirror
5	Standard	Infinity	-56.520
6	Standard	53.145	26.701	Mirror
7	Standard	24.628	-50	Mirror
8	Tilt	Infinity	40	K9
9	Evenasphere	-50.8	-	Mirror

Table 2. Sample names and compositions used for drawing calibration curves

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Table 2. Sample names and compositions used for drawing calibration curves

Samplename	Mass fraction /%
Samplename	Si	Fe	Cu	Mn	Mg	Cr	Ni	Zn	Ti	Al
E111	1.250	0.825	1.880	1.240	0.692	0.092	0.161	0.401	0.121	Others
E213b	0.287	0.313	0.129	1.520	0.052	-	0.075	0.047	0.060	Others
E924d	12.290	1.060	2.020	0.261	0.265	-	0.427	1.540	0.018	Others
6063	0.098	0.110	0.012	0.460	1.210	0.310	-	0.053	0.220	Others
E123a	0.127	0.350	4.110	0.532	1.510	-	0.037	0.147	0.039	Others

Table 3. Sample names and compositions used for verifying calibration curves
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Table 3. Sample names and compositions used for verifying calibration curves
Samplename Mass fraction /%
Si Fe Cu Mn Mg Cr Ni Zn Ti Al
K6061 0.588 0.292 0.278 0.118 1.050 0.208 0.031 0.154 0.108 Others
K6063b 0.419 0.223 0.019 0.020 0.547 0.024 - 0.027 0.023 Others

Table 4. Verification results and relative errors of sample

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Table 4. Verification results and relative errors of sample

Samplename	Mass fraction of Mg /%						Mass fraction of Ti /%
	285.17 nm			383.83 nm			323.45 nm			334.94 nm
	Standardvalue	Measuredvalue	Relativeerror	Standardvalue	Measuredvalue	Relativeerror	Standardvalue	Measuredvalue	Relativeerror	Standardvalue	Measuredvalue	Relativeerror
K6061	1.050	1.021	2.76	1.050	1.072	2.10	0.108	0.106	1.85	0.108	0.113	4.63
K6063b	0.547	0.586	7.13	0.547	0.556	1.65	0.023	0.022	4.35	0.023	0.025	8.70

Table 5. Detection limits of different spectral lines in element analysis
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Table 5. Detection limits of different spectral lines in element analysis
Parameter Mg Ti
285.17 nm 383.83 nm 323.45 nm 334.94 nm
Slope of calibration curve 3410.06 3117.09 2205.07 2398.08
Detection limit /(μg·g^-1) 564.8 538.7 405.6 398.9

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Jingyu Li, Kuan Chen, Guofei Chen, Yangyan Li, Aijun Zeng, Yu Xin. Quantitative Analysis of Magnesium and Titanium Elements in Aluminum Alloy by Handheld Laser-Induced Breakdown Spectroscopy[J]. Laser & Optoelectronics Progress, 2019, 56(2): 023002

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