Journal ArticleDOI
Field demonstrations of a direct push FO-LIBS metal sensor.
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TLDR
In the field demonstrations reported in this communication, remarkably good agreement between the in-situ FO-LIBS results and ICP lab results were obtained.Abstract:
A direct push, FO-LIBS sensor probe for real-time, in-situ measurement of metals in soils has been built and its capabilities demonstrated at three sites. The response of the FO-LIBS sensor is affected by the soil matrix conditions of grain size, composition, and water content. For each site, uncontaminated soil was collected and spiked with known quantities of the metal under investigation. These calibration standards were used to generate a site-specific calibration curve, which compensates for variations in soil matrix conditions of grain size, composition, porosity, etc. To compensate for moisture content, extra laser pulses are used to volatilize the water, higher power densities and/or shortened acquisition delay times are used. The LIBS experiment inherently exhibits poor precision since it is a point measurement. When multiple spectra are taken of a single, homogenized soil sample, there is a significant amount of variability in the peak intensities. There is no internal standard available to corr...read more
Citations
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Journal ArticleDOI
Applications of laser-induced breakdown spectroscopy for geochemical and environmental analysis: A comprehensive review
TL;DR: The application of laser-induced breakdown spectroscopy (LIBS) to the analysis of natural fluids, minerals, rocks, soils, sediments, and other natural materials is described in this article.
Book ChapterDOI
Proximal Soil Sensing: An Effective Approach for Soil Measurements in Space and Time
TL;DR: This chapter reviews proximal soil sensing, describing a large range of technologies that can be used for PSS, including electrochemical and mechanical sensors, telemetry, geographic positioning and elevation, multisensor platforms, and core measuring and down-borehole sensors.
Journal ArticleDOI
Qualitative and quantitative investigation of chromium-polluted soils by laser-induced breakdown spectroscopy combined with neural networks analysis.
Jean-Baptiste Sirven,Bruno Bousquet,Lionel Canioni,Laurent Sarger,S. Tellier,M. Potin-Gautier,I. Le Hécho +6 more
TL;DR: Two chemometric techniques, principal components analysis (PCA) and neural networks analysis (NNA), were used to discriminate the soils on the basis of their LIBS spectra and an excellent rate of correct classification was achieved and a better ability of neural networks to cope with real-world, noisy spectra was demonstrated.
Journal ArticleDOI
Development of a deep-sea laser-induced breakdown spectrometer for in situ multi-element chemical analysis
Blair Thornton,Tomoko Takahashi,Takumi Sato,Tetsuo Sakka,Ayaka Tamura,Ayumu Matsumoto,Tatsuo Nozaki,Toshihiko Ohki,Koichi Ohki +8 more
TL;DR: In this article, a deep-sea laser-induced breakdown spectrometer (ChemiCam) was deployed to perform in situ multi-element analysis of both seawater and mineral deposits at depths of over 1000m.
References
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Journal ArticleDOI
New Procedure for Quantitative Elemental Analysis by Laser-Induced Plasma Spectroscopy
TL;DR: In this paper, a new procedure based on the laser-induced plasma spectroscopy (LIPS) technique was proposed for calibration-free quantitative elemental analysis of materials, which allows the matrix effects to be overcome, yielding precise and accurate quantitative results on elemental composition of materials without use of calibration curves.
Book
Experimental transition probabilities for spectral lines of seventy elements
TL;DR: In this article, the principal lines of the elements generally observed under ordinary conditions in arc spectra, together with their relative intensities on a true scale of relative energy, were provided, along with a list of the most common lines of each element.
Journal ArticleDOI
Fundamentals and Applications of Laser-Induced Breakdown Spectroscopy
TL;DR: In this paper, the authors reviewed the literature on laser-induced breakdown spectroscopy by dividing the literature into three categories according to target phase: solid, liquid, or gas.
Journal ArticleDOI
Characterization of Laser-Induced Breakdown Spectroscopy (LIBS) for Application to Space Exploration:
TL;DR: In this article, a characterization of a laser-induced breakdown spectroscopy (LIBS) for the analysis of soils at reduced air pressures and in a simulated Martian atmosphere (5-7 torr pressure of CO2) is presented.
Journal ArticleDOI
Detection of Metals in the Environment Using a Portable Laser-Induced Breakdown Spectroscopy Instrument
TL;DR: A portable instrument based on laser-induced breakdown spectroscopy (LIBS) has been developed for the detection of metal contaminants on surfaces as mentioned in this paper, which consists of a sampling probe connected to the main analysis unit by electrical and optical cabling.