Laser ablation molecular isotopic spectrometry (LAMIS): current state of the art

Bol’shakov, Alexander A.; Mao, Xianglei; González, Jhanis; Russo, Richard E.

doi:10.1039/c5ja00310e

Cited by 101 publications

(57 citation statements)

References 44 publications

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“…The advanced modification of LIBS referred to as laser ablation molecular isotopic spectrometry (LAMIS) has constituted a powerful approach to track the origin of atoms involved in formation of the investigated molecules by substituting specific atoms with their corresponding isotope. 124–126…”

Section: Formation Routesmentioning

confidence: 99%

Laser-Induced Breakdown Spectroscopy (LIBS) of Organic Compounds: A Review

Moros

Laserna

2019

Appl Spectrosc

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Optical emission of laser-produced plasmas from solids, liquids, and gases, from their fundamentals to their potential applications, has been comprehensively reported in multiple research manuscripts, reviews, and books. There are nevertheless enough serious unanswered issues and questions still present on what at first sight seemed to be much easier, the laser-induced breakdown spectroscopy (LIBS) of organic compounds. Ideally, for all organic molecules, one would expect homologous emission spectra, differing only in the presence or absence of signals associated to the containing elements and their intensity relative to their content. Yet, the reality is much more complex. In laser-induced plasmas of organic compounds, a broad variety of species may be formed depending on the irradiation parameters. Furthermore, there is not a uniform breakage for all the molecules constituting the ablated mass. At once, the plasma is a dynamic entity per se, which implies that the spatial distribution of each species in the source plasma is different. In addition, multiple circumstances and mechanisms may contribute to the extinction of some species and the formation of new ones. Thus, the surrounding atmosphere where the plasma evolves and the time elapsed from its formation also have a strong influence on the spectral signature gathered. In essence, any change in any of the variables involved in the cycle of an organic plasma, from those causing its formation to those governing its expansion, defines a new scenario that lead to a different LIBS spectrum for a same organic compound. The present paper reviews the common emitting species populating the laser plasmas of organic compounds, the routes to their formation, mostly those related to the production of diatomic radicals, the dynamics of such species, in space and time, and the physical parameters that they confer to the plasma. Concurrently, the influence that the structures of the molecular solids and the set of excitation variables may exert on the optical emissions observed is also discussed. Finally, some details on the modeling of organic plasmas are provided.

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Section: Formation Routesmentioning

confidence: 99%

Laser-Induced Breakdown Spectroscopy (LIBS) of Organic Compounds: A Review

Moros

Laserna

2019

Appl Spectrosc

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“…This use of the molecular bands is based on two factors: (a) that the nitrogen content in coal is well below 1% and (b) that laser ablation molecular isotope spectrometry (LAMIS) studies revealed that CN band head intensities are proportional to the carbon content of organic compound samples. 31 The CN band intensity was also successfully used for the analysis of UC in fly ash by LIBS. 16 The set of graphs in Figure 3 show the experimental data obtained in this study for the above outlined correlations.…”

Section: Resultsmentioning

confidence: 99%

Qualitative Discrimination Analysis of Coals Based on Their Laser-Induced Breakdown Spectra

et al. 2016

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Six different coal samples (anthracite, Czech brown coal, Polish brown coal, lignite, graphite, and Pećs-vasas brown coal) were studied by using laser-induced breakdown spectroscopy (LIBS) in order to assess its capability for use in coal quality control. The spectral features of the coals as well as their correlation with the results of proximate analysis was investigated. The second part of the study deals with the classification (qualitative discrimination analysis) of coals based on their visible-range LIBS spectra using various statistical methods. Canonical linear discriminant analysis was found to be the most efficient; using five canonical variables and after reducing the spectra to 18 variables, the achieved classification accuracy was 95.33% according to the cross-validation test of the model. The described results indicate that LIBS data can be efficiently used for the quality control of coals and thus can also contribute to the indirect control of the combustion process.

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“…54 This seems like a logical evolution for two reasons: i) MAS is an important area of research in this particular field of high-resolution continuum source, as discussed before, because diatomic molecules can be formed and their spectra resolved; ii) it has been already shown for laser induced breakdown spectrometry (LIBS) by Russo et al that the monitoring of molecular spectra provides higher isotopic shifts. 64,65 Therefore, the same idea could also be applied to HR CS MAS.…”

Section: Isotopic Analysis Via Molecular Monitoringmentioning

confidence: 99%

Quo vadishigh-resolution continuum source atomic/molecular absorption spectrometry?

Resano

García-Ruiz

Aramendía

et al. 2019

J. Anal. At. Spectrom.

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Laser ablation molecular isotopic spectrometry (LAMIS): current state of the art

Abstract: Laser Ablation Molecular Isotopic Spectrometry (LAMIS) is a direct and rapid technique that measures optical emission in laser-induced plasmas for isotopic analysis.

Cited by 101 publications

References 44 publications

Laser-Induced Breakdown Spectroscopy (LIBS) of Organic Compounds: A Review

Laser-Induced Breakdown Spectroscopy (LIBS) of Organic Compounds: A Review

Qualitative Discrimination Analysis of Coals Based on Their Laser-Induced Breakdown Spectra

Quo vadishigh-resolution continuum source atomic/molecular absorption spectrometry?

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