A Rising Force for the World-Wide Development of Laser-Induced Breakdown Spectroscopy

Wang, Zhe; Dong, Fengzhong; Zhou, Weidong

doi:10.1088/1009-0630/17/8/01

Cited by 62 publications

(36 citation statements)

References 49 publications

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“…To further reduce the RSD of the C 247.86 nm line intensity, the intensities of Si 251.61 nm, Si 252.41 nm, and Si 288.16 nm and the total integrated intensity were individually used to normalize the line intensity of C 247.86 nm, as presented in Figure b. The RSD of the C 247.86 nm line intensity improved from 3.18% to values in the range of 1.69–2.48% (the normalized line intensity), which matches the RSD of pelleted fly ash . It can be concluded that the mass flow rate of fly ash affects the false hit rate in the gas–solid flow.…”

Section: Resultsmentioning

confidence: 77%

“…Recently, laser-induced breakdown spectroscopy (LIBS) technology, which is potentially one of the most promising technologies for quick elemental analysis, , was also employed to determine UC in fly ash. − Ctvrtnickova et al , focused on the experimental conditions and optimization of the sample preparation for improving the construction of the calibration curve of carbon and other elements in fly ash. They compressed a mixture of fly ash particles and binders into pellets for LIBS analysis in the laboratory.…”

Section: Introductionmentioning

confidence: 99%

“…Several technologies have been developed as on-line monitors of UC, such as the nondispersive infrared (NDIR) technique, the microwave-based method, and the loss-on-ignition (LOI) technique. 4−6 Recently, laser-induced breakdown spectroscopy (LIBS) technology, which is potentially one of the most promising technologies for quick elemental analysis, 7,8 was also employed to determine UC in fly ash. 9−11 Ctvrtnickova et al 12,13 focused on the experimental conditions and optimization of the sample preparation for improving the construction of the calibration curve of carbon and other elements in fly ash.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Fly Ash Laser-Induced Plasma for Improving the On-line Measurement of Unburned Carbon in Gas–Solid Flow

Yao

Zhao

et al. 2017

Energy Fuels

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A new route for directly measuring the fly ash unburned carbon in a gas–solid flow by laser-induced breakdown spectroscopy (LIBS) was proposed. A homemade gas–solid flow generation system was developed to simulate the gas–solid flow in the duct of a coal-fired plant. For improving the measurement performance, the emission characteristics of the laser-induced plasma, the influence of the fly ash mass flow rate, and the correlation between the unburned carbon content and the carbon emission intensity were studied in detail. The SNR of the Si spectral line at 288.15 nm was selected as the index for false spectra identification because the distribution of Si is not related to the particle size. The results highlight the change of the plasma shape and volume with fluctuations of the gas–solid flow because of the uneven distribution of the fly ash particle size and number in the laser focal spot. The mass flow rate of the fly ash affected the false hit rate, while it did not affect the intensity of the analyte lines. The regression coefficients (R 2) between the normalized intensity of C 247.86 nm and the unburned carbon content improved from 0.93 to 0.98 when the false spectra were rejected. The good agreement between the normalized intensity of C 247.86 nm and the unburned carbon content indicates that LIBS can be developed as a promising tool for directly measuring the fly ash unburned carbon in a gas–solid flow.

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Section: Resultsmentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Characterization of Fly Ash Laser-Induced Plasma for Improving the On-line Measurement of Unburned Carbon in Gas–Solid Flow

Yao

Zhao

et al. 2017

Energy Fuels

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“…Laser-induced breakdown spectroscopy (LIBS) as an analytical detection technique based on atomic emission spectroscopy has attracted a great attention in various industries because of the non-contact, fast response and multi-dimensional features as the qualitative and quantitative analytical detection technique. [8][9][10][11][12][13] LIBS has been widely applied in the metallurgy field to demonstrate the practicability for process analysis and control factors monitoring. 14,15) During the iron and steel manufacturing processes, there are various types of materials including solid phase, liquid phase and gas phase, such as raw materials, smelting processes, products and slags, heavy metals in flue gas.…”

Section: Feasibility Investigation For Online Elemental Monitoring Ofmentioning

confidence: 99%

Feasibility Investigation for Online Elemental Monitoring of Iron and Steel Manufacturing Processes using Laser-Induced Breakdown Spectroscopy

et al. 2020

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The metallurgical industries are very important for social development. In order to improve the metallurgical techniques and quality of products, the real-time analysis and monitoring of iron and steel manufacturing processes are very significant. Laser-induced breakdown spectroscopy (LIBS) has been studied and applied for the contents measurement of iron and steel. In this paper, the remote open-path LIBS measurement was studied under different sample temperature, lens to target distance (LTD), sample angle conditions to clarify its online measurement features. The 3D profile measurement system of parallel laser beam fringes projection was also developed to measure the sample profile at different sample temperature. The measurement results demonstrated the robustness of remote open-path LIBS system and 3D profile measurement system. However, the correction is necessary to enhance the detection ability of LIBS online measurement. In order to improve the precision and accuracy of real-time elemental measurement, an innovative co-axial laser beam measurement system combining LIBS and 3D profile techniques is proposed to automatically adjust the focus unit and measure the sample components. The further study of this promising method will be developed for online application of iron and steel manufacturing processes. KEY WORDS: laser-induced breakdown spectroscopy; 3D profile; remote measurement; iron and steel manufacturing processes.

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“…As a newly developed spectroscopic technology, laser-induced breakdown spectroscopy (LIBS) has been widely applied in various fields [ 2 , 3 , 4 , 5 , 6 ], especially the ChemCam system applied in Mars exploration has attracted the worldwide attention [ 7 , 8 , 9 ]. However, due to the high density, compression resistance and high heat conductivity of water [ 10 ], compared with the successful applications in air environment, it is still a big challenge to apply LIBS technology to deep-sea research.…”

Section: Introductionmentioning

confidence: 99%

Development and Field Tests of a Deep-Sea Laser-Induced Breakdown Spectroscopy (LIBS) System for Solid Sample Analysis in Seawater

Liu

Guo

Tian

et al. 2020

Sensors

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In recent years, the investigation and exploitation of hydrothermal region and polymetallic mineral areas has become a hot topic. The emergence of underwater vehicle platforms has made it possible for new chemical sensors to be applied in marine in-situ detection. Laser-induced breakdown spectroscopy (LIBS), with its advantages of rapid real-time analysis, sampling without pretreatment, simultaneous multi-element detection and stand-off detection, has great potential in marine applications. In this paper, a newly more compact and lighter underwater LIBS system based on the LIBSea system named LIBSea II was developed and tested both in the laboratory and sea trials. The system consists of a Nd:YAG single-pulse laser at 1064 nm, a fiber spectrometer, optical layout, a power supply module and an internal environment sensor. The system is encapsulated in a pressure vessel (Φ 190 mm × L 588 mm) with an optical window on the end cap. Experimental parameters of the system including laser energy and delay time were firstly optimized in the laboratory. Then, field test of the system in nearshore was performed with various samples, including pure metal and alloy samples as well as a manganese nodule sample from deep sea, to verify the detection performance of the LIBSea II system. In 2019, the system was deployed on a remotely operated vehicle (ROV) of Haima for deep sea trial, and atomic lines of K, Na, Ca and strong molecular bands of CaOH from a carbonate rock sample were obtained for the first time at depths of 1400 m. These results show that the LIBSea II system has great potential to be used in deep-sea geological exploration.

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A Rising Force for the World-Wide Development of Laser-Induced Breakdown Spectroscopy

Cited by 62 publications

References 49 publications

Characterization of Fly Ash Laser-Induced Plasma for Improving the On-line Measurement of Unburned Carbon in Gas–Solid Flow

Characterization of Fly Ash Laser-Induced Plasma for Improving the On-line Measurement of Unburned Carbon in Gas–Solid Flow

Feasibility Investigation for Online Elemental Monitoring of Iron and Steel Manufacturing Processes using Laser-Induced Breakdown Spectroscopy

Development and Field Tests of a Deep-Sea Laser-Induced Breakdown Spectroscopy (LIBS) System for Solid Sample Analysis in Seawater

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