The quantitative analysis of alloy element by femtosecond laser-induced breakdown spectroscopy with sample heating and spatial confinement
LIU Yan-bin1, ZHAO Shang-yong*2, HOU Zong-yu2,3, WANG Zhe2,3, GAO Xun4
1. China Energy Engineering Group Co., Ltd., Beijing 100034, China; 2. State Key Lab of Power Systems, InternationalJoint Laboratory on Low Carbon Clean Energy Innovation, Department of Energyand Power Engineering, TsinghuaUniversity, Beijing 100084, China; 3. Shanxi Research Institute for Clean Energy, Tsinghua University, Taiyuan030032, China; 4. School of Science, Changchun University of Science and Technology, Changchun 130022, China
Abstract：Aluminum alloy was the most commonly used nonferrous metal material in industry, which was formed by adding certain elements, and become an ideal structural materials. How to detect the content of elements in alloy quickly and accurately was also a key problem in production and application. The quantitative analysis of aluminium alloy element by femtosecond laser-induced breakdown spectroscopy methods with sample heating and spatial confinement was investigated. The physical reason of plasma emission spectral intensity enhanced and stability improved was discussed. The experimental results showed that femtosecond laser produced plasma emission spectral intensity effectively enhanced under the sample heating and spatial confinement and the plasma emission delay had a significantly extension with the sample temperature increased. Besides, the Mn element of aluminium alloy series was determined, and the limits of detection, relative standard deviation, R-squared of fs-LIBS under three conditions, including no confinement, spatial confinement and sample heating combined with spatial confinement, were compared. It was found that the limits of detection and relative standard deviation of sample heating at 150℃ combined with spatial confinement was reduced to 1/5 and 1/4 of those obtained by no confinement, respectively, and the R-squared was above 0.99. Hence, the detection sensitivity and analytical precision of alloy element quantitative analysis in LIBS could be improved by combining sample heating and spatial confinement.
Kim G,Yoon Y G,Kim H A,et al.Elemental composition of Arctic soils and aerosols in Ny-Ålesund measured using laser-induced breakdown spectroscopy[J].Spectrochimica Acta Part B:Atomic Spectroscopy,2017,134:17-24.
[2]
Lithgowa G A,Robinsonb A L,Buckleya S G.Ambient measurements of metal-containing PM2.5 in an urban environment using laser-induced breakdown spectroscopy[J].Atmospheric Environment,2004,38(20):3319-3328.
[3]
Anglos D.Laser-induced break-down spectroscopy in art and archaeology[J].Applied Spectroscopy,2001,55(6):186-205.
[4]
Abdel-Salam Z,Attala S A,Daoud E,et al.Monitoring of somatic cells in milk via laser analytical techniques for the early detection of mastitis[J].Dairy Science & Technology,2015,95(3):331-340.
[5]
Gottfried J L.Influence of metal substrates on the detection of explosive residues with laser-induced breakdown spectroscopy[J].Applied optics,2013,52(4):B10-B19.
[6]
Sanginés R,Sobral H,Alvarez-Zauco E.The effect of sample temperature on the emission line intensification mechanisms in orthogonal double-pulse laser induced breakdown spectroscopy[J].Spectrochimica Acta Part B:Atomic Spectroscopy,2012,68:40-45.
[7]
Liu Y,Tong Y,Li S,et al.Effect of sample temperature on laser-induced semiconductor plasma spectroscopy[J].Chinese Optics Letters,2017,14(12):123001(1-5).
[8]
Fu Y,Hou Z,Wang Z,et al.Physical insights of cavity confinement enhancing effect in laser-induced breakdown spectroscopy[J].Optics Express,2016,24(3):3055-3066.
[9]
Li C,Guo L He X,et al.Element dependence of enhancement in optics emission from laser-induced plasma under spatial confinement[J].Journal of Analytical Atomic Spectrometry,2014,29(4):638-643.
[10]
Zhao S,Gao X,Chen A,et al.Effect of spatial confinement on Pb measurements in soil by femtosecond laser-induced breakdown spectroscopy[J].Applied Physics B,2020,126(1):7(1-6).
[11]
Darbani S M R,Ghezelbash M,Majd A E,et al.Temperature effect on the optical emission intensity in laser induced breakdown spectroscopy of super alloys[J].Journal of the European Optical Society Rapid Publications,2014,9:14058(1-8).
[12]
Eschlböck-Fuchs S,Haslinger M J,Hinterreiter A,et al.Influence of sample temperature on the expansion dynamics and the optical emission of laser-induced plasma[J].Spectrochimica Acta Part B:Atomic Spectroscopy,2013,87:36-42.
