Haut PDF LIBS (Laser-induced breakdown spectroscopy) pour l'exploration martienne

LIBS (Laser-induced breakdown spectroscopy) pour l'exploration martienne

LIBS (Laser-induced breakdown spectroscopy) pour l'exploration martienne

A droite le quicklook pour le spectre moyen avec la localisation des raies les plus caractéristiques, et à gauche le quicklook sur la profondeur : les différents spectres acquis au même e[r]

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Development of Laser-Induced Breakdown Spectroscopy (LIBS) for Nuclear Safety Inspections and Pharmaceutical Process Analytical Chemistry Applications

Development of Laser-Induced Breakdown Spectroscopy (LIBS) for Nuclear Safety Inspections and Pharmaceutical Process Analytical Chemistry Applications

Access and use of this website and the material on it are subject to the Terms and Conditions set forth at Development of Laser-Induced Breakdown Spectroscopy (LIBS) for Nuclear Safety Inspections and Pharmaceutical Process Analytical Chemistry Applications

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Analysis of molten material by laser-induced breakdown spectroscopy (LIBS)

Analysis of molten material by laser-induced breakdown spectroscopy (LIBS)

Montréal, Québec, CANADA H2V 3X9 Abstract: Charge compositions in many industrial processes are monitored by periodic sampling followed by time-consuming sample preparation and laboratory analysis. Virtually eliminating this delay through real-time in-situ Laser-induced breakdown spectroscopy (LIBS) analysis has the potential to significantly increase productivity and improve process control. However, LIBS analysis of high-temperature molten metals in processing vessels still presents a number of challenges. To have a reliable and accurate sensor the following requirements should be met:
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Enabling Molecular Analysis with Laser-Induced Breakdown Spectroscopy (LIBS) Using Chemometrics

Enabling Molecular Analysis with Laser-Induced Breakdown Spectroscopy (LIBS) Using Chemometrics

NRC Publications Archive Archives des publications du CNRC Access and use of this website and the material on it are subject to the Terms and Conditions set forth at Enabling Molecular Analysis with Laser-Induced Breakdown Spectroscopy (LIBS) Using Chemometrics

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Laser-induced breakdown spectroscopy (LIBS) as an emerging tool: figures, facts and future

Laser-induced breakdown spectroscopy (LIBS) as an emerging tool: figures, facts and future

Laser-Induced Breakdown Spectroscopy (LIBS) as an Emerging Tool: Figures, Facts and Future *M.SABSABI, P. Bouchard, F.R. Doucet, L. Ozcan, A. Moreau, A Harhira, A. Blouin National Research Council 75 boul. De Mortagne Boucherville, Qc J4B 6Y4 Canada

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Laser-Induced Breakdown Spectroscopy (LIBS): A Highly Adaptive Spectroscopic Sensor for Process Monitoring

Laser-Induced Breakdown Spectroscopy (LIBS): A Highly Adaptive Spectroscopic Sensor for Process Monitoring

NRC Publications Archive Archives des publications du CNRC Access and use of this website and the material on it are subject to the Terms and Conditions set forth at Laser-Induced Breakdown Spectroscopy (LIBS): A Highly Adaptive Spectroscopic Sensor for Process Monitoring

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Monitoring manufacturing changes using molecular laser-induced breakdown spectroscopy (MO-LIBS)

Monitoring manufacturing changes using molecular laser-induced breakdown spectroscopy (MO-LIBS)

Student paper: no Poster presentation preferred: yes Monitoring Manufacturing Changes using Molecular Laser-Induced Breakdown Spectroscopy (MO-LIBS) François R. Doucet 1 , Patrick J. Faustino 2 , Martine Tourigny 3 , Robbe C. Lyon 2 and Mohamad

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Laser-Induced Breakdown Spectroscopy (LIBS): Past, Present and Future

Laser-Induced Breakdown Spectroscopy (LIBS): Past, Present and Future

Mohamad.sabsabi@cnrc-nrc.gc.ca The laser-induced breakdown spectroscopy (LIBS) technique is based on the spectroscopic analysis of light emission from the plasma generated by focusing a powerful laser beam on a target. LIBS is being used as an analytical method by a growing number of research groups. The growing interest in LIBS, particularly in the last decade, has led to an increasing number of publications on its applications, both in the laboratory and in industry. Recent developments in technology and research in spectroscopic detectors have suggested a promising future and an improvement of measurements in plasma spectroscopy. Undoubtedly, the advent of high quality solid-state detectors is revolutionizing the field of atomic spectroscopy. New optical technologies, when coupled with these new generations of detectors, provide powerful tools for plasma diagnostics and spectrochemical analysis [1,2]. An important advantage of the LIBS technique over classical methods stems from the possibility of in-situ analysis of virtually all types of materials (solids, liquids, molten materials, and gases) without the need for any sample preparation. In this presentation, we will give an overview on the development of the LIBS technique in the past, present and some perspectives for its future as analytical tool. Also, we will cover fundamental studies, analytical results and applications of LIBS related to the field of analytical chemistry, real time analysis and process control.
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Monitoring of Manufacturing Changes and Formulation Excipients on Solid Oral Dosage Forms of Furosemide Using Chemometrics and Laser-Induced Breakdown Spectroscopy (LIBS)

Monitoring of Manufacturing Changes and Formulation Excipients on Solid Oral Dosage Forms of Furosemide Using Chemometrics and Laser-Induced Breakdown Spectroscopy (LIBS)

NRC Publications Archive Archives des publications du CNRC Access and use of this website and the material on it are subject to the Terms and Conditions set forth at Monitoring of Manufacturing Changes and Formulation Excipients on Solid Oral Dosage Forms of Furosemide Using Chemometrics and Laser-Induced Breakdown Spectroscopy (LIBS)

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Advanced laser-induced breakdown spectroscopy (LIBS) sensor for gold mining

Advanced laser-induced breakdown spectroscopy (LIBS) sensor for gold mining

There is a need in the mining industry for determining quickly and in the field the concentration of gold in mineral ore samples. Existent portable analyzers cannot determine the gold content at the ppm range. Hence, a portable LIBS (Laser-Induced Breakdown Spectroscopy) appears as a good candidate but developments are required to fulfill the needs of the gold mining industry. Developing a functional LIBS based analyzer involves several challenges to be addressed prior to its use in the field. To be of practical use, the analyzer has to probe a representative sampling of the surface of the mineral samples and has to tackle the matrix effect resulting from several mineralogical compositions of the samples. This paper presents the recent on-going work at the National Research Council Canada (NRC) and Laval University using LIBS for gold mining, from the determination of gold-bearing rock composition to direct detection of gold and system prototyping.
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Analysis of additives and intermetallic inclusions in molten zinc by laser-induced breakdown spectroscopy (LIBS)

Analysis of additives and intermetallic inclusions in molten zinc by laser-induced breakdown spectroscopy (LIBS)

Access and use of this website and the material on it are subject to the Terms and Conditions set forth at Analysis of additives and intermetallic inclusions in molten zinc by laser-induced breakdown spectroscopy (LIBS) Sabsabi, Mohamad; Héon, René; Bouchard, Paul; Meilland, Raymond; Lamandé, Alain

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Improving laser-induced breakdown spectroscopy (LIBS) performance for iron and lead determination in aqueous solutions with laser-induced fluorescence (LIF)

Improving laser-induced breakdown spectroscopy (LIBS) performance for iron and lead determination in aqueous solutions with laser-induced fluorescence (LIF)

Received 13th May 2009, Accepted 23rd July 2009 First published as an Advance Article on the web 10th August 2009 DOI: 10.1039/b909485g The combination of laser-induced breakdown spectroscopy (LIBS) and laser-induced fluorescence (LIF) was investigated to improve the limit of detection (LoD) of trace elements in liquid water, while preserving the distinctive on-line monitoring capabilities of LIBS analysis. The influence of the main experimental parameters, namely the ablation fluence, the excitation fluence, and the inter-pulse delay was studied to maximize the fluorescence signal. The plasma was produced by a 266 nm frequency- quadrupled Q-switched Nd:YAG laser and the trace elements under investigation were then re-excited by a nanosecond optical parametric oscillator (OPO) laser, delivering pulses in the sub-mJ energy range, and tuned to strong absorption lines of the trace elements. The reproducibility of the
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Enabling Molecular Analysis with Laser-Induced Breakdown Spectroscopy (LIBS) Using Chemometrics

Enabling Molecular Analysis with Laser-Induced Breakdown Spectroscopy (LIBS) Using Chemometrics

NRC Publications Archive Archives des publications du CNRC Access and use of this website and the material on it are subject to the Terms and Conditions set forth at Enabling Molecular Analysis with Laser-Induced Breakdown Spectroscopy (LIBS) Using Chemometrics

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Laser-Induced Breakdown Spectroscopy (LIBS) of elements in Bayer liquor

Laser-Induced Breakdown Spectroscopy (LIBS) of elements in Bayer liquor

/ La version de cette publication peut être l’une des suivantes : la version prépublication de l’auteur, la version acceptée du manuscrit ou la version de l’éditeur. Access and use of [r]

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Analysis of molten metals by laser-induced breakdown spectroscopy (LIBS)

Analysis of molten metals by laser-induced breakdown spectroscopy (LIBS)

L’accès à ce site Web et l’utilisation de son contenu sont assujettis aux conditions présentées dans le site LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D’UTILISER CE SITE WEB. READ THESE T[r]

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Development of Molecular Laser-Induced Breakdown Spectroscopy (MO-LIBS) Using Chemometrics: An Innovative Spectroscopic Approach

Development of Molecular Laser-Induced Breakdown Spectroscopy (MO-LIBS) Using Chemometrics: An Innovative Spectroscopic Approach

/ La version de cette publication peut être l’une des suivantes : la version prépublication de l’auteur, la version acceptée du manuscrit ou la version de l’éditeur. Access and use of [r]

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Predicting pharmaceutical manufacturing changes using molecular laser-induced breakdown spectroscopy and chemometrics

Predicting pharmaceutical manufacturing changes using molecular laser-induced breakdown spectroscopy and chemometrics

In many pharmaceutical manufacturing applications, Laser-Induced Breakdown Spectroscopy (LIBS) makes possible at-line rapid measurements of many formulation ingredients a[r]

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Preface fourth international conference on laser induced plasma spectroscopy and applications (LIBS 2006)

Preface fourth international conference on laser induced plasma spectroscopy and applications (LIBS 2006)

Preface Fourth International Conference on Laser Induced Plasma Spectroscopy and Applications (LIBS 2006) The fourth international LIBS conference on laser-induced breakdown spectroscopy, LIBS 2006, was held in Montreal, Canada September 4–8, 2006. It was organized by the National Research Council of Canada's Industrial Materials Institute in collaboration with the Quebec Materials Network. Held near the historic Centre-Ville district of cosmopolitan Montreal, it attracted over 192 papers (126 posters, 11 invited speakers, 40 oral presentations, one panel discussion on standardization, 15 presentations in the LIBS Workshop devoted to security applications) and 220 attendees from 24 countries representing the five continents. This was the fourth in this series of international conferences. Previous confer- ences were held in Pisa (2000), Italy, Orlando (2002), Florida, and Malaga (2004), Spain. Interspersed were the EMSLIBS conferences, regional meetings in the Euro-Mediterranean area. Montreal, with its international flavor, served as an ideal setting for this conference.
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On-line Monitoring of Nanoparticle Synthesis by Laser-Induced Breakdown Spectroscopy in Vacuum

On-line Monitoring of Nanoparticle Synthesis by Laser-Induced Breakdown Spectroscopy in Vacuum

On-line Monitoring of Nanoparticle Synthesis by Laser-Induced Breakdown Spectroscopy in Vacuum We propose a method for on-line monitoring of gas phase synthesis of nanoparticles. It is based on Laser-Induced Breakdown Spectroscopy (LIBS). LIBS is a method of chemical analysis that offers many advantages. It allows remote specific detection of most of the chemical elements in a sample and at very low concentrations. This technique was already used to probe the chemical composition stability of SiC nanoparticles during their production by laser pyrolysis. However, sampling stability control difficulties and interface problems between optical elements and particle flow are a drag to its use as an efficient method in continuous-wave mode on high-throughput production plants. Here we propose a new experimental setup for eliminating these difficulties by performing the laser- particle interaction in vacuum. A small part of the aerosol stream is sampled and driven to an aerodynamic lens system. The latter produces a dense and collimated beam of nanoparticles under vacuum from the atmospheric pressure aerosol flow. The laser-particle interaction takes place at 10 -3
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Laser-induced breakdown spectroscopy acoustic testing of the Mars 2020 microphone

Laser-induced breakdown spectroscopy acoustic testing of the Mars 2020 microphone

5.5. Spectral analysis The evolution of spectral content of a single LIBS shot can also be studied. The amplitude spectral density (computed using the Welch method; Welch, 1967 ) of the 432 shots on the 15 tonnes compacted JSC1 are represented in Fig. 18 . In this figure, the spectra were estimated over a 1.3 ms long time window and are normalised with respect to the in- tegral of the median spectrum. As mentioned in Section 4.2 , the signal rises from the noise floor below 10 kHz. The typical spectrum for each shot looks similar but the intensity decreases with the number of shots. This is coherent with Fig. 17 as the energy of the time signal is equal to the integral of the corresponding spectrum (see Parseval's theorem saying that the energy of a signal is equal to the integral of the square of its transform in the frequency domain). As the intensity differences are largest in the LIBS bandwidth (around 1 kHz), each spectrum is inte- grated between 700 Hz and 2 kHz. The evolution of the integrated spectral densities, normalised by the mean value over the first 10 shots, is shown in Fig. 19 for the different JSC1 targets.
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