Abstract：Highly sensitive zinc analysis was necessary and important in different fields, such as industrial production, metallurgical manufacturing and so on. Conventional laser-induced breakdown spectroscopy (LIBS) had relatively low analytical sensitivity in the determination of zinc elements in solid samples. High repetition rate spark-discharge enhanced laser-induced breakdown spectroscopy combined with weak signal detection with lock-in amplifier was developed to realize highly sensitive zinc analysis for aluminum alloy samples. Experimentally operated under 1 kHz pulse repetition rate, the optical radiation of laser-induced plasma was enhanced by spark-discharge; the zinc atomic emission signal was selectively amplified and the continuum background of the plasma radiation was rejected by a gated pre-amplifier; finally a lock-in amplifier was used to realize highly sensitive detection of weak atomic emission signal. Based on the standard samples, a calibration curve of zinc in aluminum alloy samples was established under currently optimized experimental conditions. The limit of detection for zinc reached 3.8μg/g, which was an order better than those obtained by traditional LIBS in analysis of zinc in aluminum alloy. This technology was helpful to realize direct and highly sensitive quantitative analysis of zinc and other elements in alloy samples, and could be well applied in the field of metallurgical analysis.
张啸.铸造锌合金的研究进展与实际应用 [J].能源与节能,2012(4):93-94.ZHANG Xiao.Casting zinc alloys research and application[J].Energy and Energy Conservation,2012(4):93-94.
[2]
Cakmak I,Kutman U B.Agronomic biofortification of cereals with zinc:a review[J].European Journal of Soil Science,2018,69(1):172-180.
[3]
沈桂华,李华昌,史烨弘.激光诱导击穿光谱发展现状[J].冶金分析,2016,36(5):16-25.SHEN Gui-hua,LI Hua-chang,SHI Ye-hong.Progress in laser induced breakdown spectroscopy[J].Metallurgical Analysis,2016,36(5):16-25.
[4]
屈华阳,胡净宇,赵雷,等.激光诱导击穿光谱法分析表面氧化钢铁样品中的碳硅锰磷硫铬镍铜铝[J].冶金分析,2012,32(7):1-6.QU Hua-yang,HU Jing-yu,ZHAO Lei,et al.Determination of nine elements in iron & steel samples with surface oxidization by laser induced breakdown spectroscopy [J].Metallurgical Analysis,2012,32(7):1-6.
[5]
Ruan F Q,Zhang T L,Li H.Laser-induced breakdown spectroscopy in archeological science:a review of its application and future perspectives[J].Applied Spectroscopy Reviews,2019,54(7):573-601.
[6]
Rai A K,Zhang H S,Yuan F Y,et al.Parametric study of a fiber-optic laser-induced breakdown spectroscopy probe for analysis of aluminum alloys[J].Spectrochimica Acta Part B:Atomic Spectroscopy,2001,56(12):2371-2383.
[7]
Dell′Aglio M,Gaudiuso R,Senesi G S,et al.Monitoring of Cr,Cu,Pb,V and Zn in polluted soils by laser induced breakdown spectroscopy (LIBS)[J].Journal of Environmental Monitoring,2011,13(5):1422-1426.
[8]
Meng D S,Zhao N J,Ma M J,et al.Application of a mobile laser-induced breakdown spectroscopy system to detect heavy metal elements in soil [J].Applied Optics,2017,56(18):5402-5210.
[9]
Aragon C,Aguilera J A.Direct analysis of aluminum alloys by CSigma laser-induced breakdown spectroscopy [J].Analytica Chimica Acta,2018,1009:12-19.
[10]
Hahn D W,Omenetto N.Laser-induced breakdown spectroscopy (LIBS),part I:review of basic diagnostics and plasma-particle interactions:still-challenging issues within the analytical plasma community[J].Applied Spectroscopy,2010,64(12):335A-366A.
[11]
Gautier C,Fichet P,Menut D,et al.Quantification of the intensity enhancements for the double-pulse laser-induced breakdown spectroscopy in the orthogonal beam geometry[J].Spectrochimica Acta Part B:Atomic Spectroscopy,2005,60(2):265-276.
[12]
Khalil A A,Labib O A.Detection of micro-toxic elements in commercial coffee brands using optimized dual-pulsed laser-induced spectral analysis spectrometry[J].Applied Optics,2018,57(23):6729-6741.
[13]
Popov A M,Colao F,Fantoni R.Spatial confinement of laser-induced plasma to enhance LIBS sensitivity for trace elements determination in soils[J].Journal of Analytical Atomic Spectrometry,2010,25(6):837-848.
[14]
Khumaeni A,Motonobu T,Katsuaki A,et al.Enhancement of LIBS emission using antenna-coupled microwave [J].Optics Express,2013,21(24):29755-29768.
[15]
Dong D M,Jiao L Z,Du X F,et al.Ultrasensitive nanoparticle enhanced laser-induced breakdown spectroscopy using a super-hydrophobic substrate coupled with magnetic confinement[J].Chemical Communications,2017,53(33):4546-4549.
[16]
Hilbk-Kortenbruck F,Noll R,Wintjens P,et al.Analysis of heavy metals in soils using laser-induced breakdown spectrometry combined with laser induced fluorescence[J].Spectrochimica Acta Part B:Atomic Spectroscopy,2001,56(6):933-945.
[17]
Kang J,Li R H,Wang Y R,et al.Ultrasensitive detection of trace amounts of lead in water by LIBS-LIF using a wood-slice substrate as a water absorber[J].Journal of Analytical Atomic Spectrometry,2017,32(11):2292-2299.
[18]
Nassef O A,Elsayed-Ali H E.Spark discharge assisted laser induced breakdown spectroscopy[J].Spectrochimica Acta Part B:Atomic Spectroscopy,2005,60(12):1564-1572.
[19]
Li K X,Zhou W D,Shen Q M,et al.Laser ablation assisted spark induced breakdown spectroscopy on soil samples[J].Journal of Analytical Atomic Spectrometry,2010,25(9):1475-1481.
[20]
Sakka T,Irie K,Fukami K,et al.Emission spectroscopy of laser ablation plasma with time gating by acousto-optic modulator[J].Review of Scientific Instruments,2011,82(2):023112.
[21]
Wyner E F,Sousa J A,Roach J F.Application of a lock-in amplifier for detecting nanosecond dye laser pulses[J].Optical Engineering,1974,13(2):154-158.
[22]
Kang J,Jiang Y H,Li R H,et al.Sensitive elemental analysis with high repetition rate laser-ablation spark induced breakdown spectroscopy combined with lock-in signal detection[J].Spectrochimica Acta Part B:Atomic Spectroscopy,2019,155:50-55.
