Variables Influencing the Precision of Laser-Induced Breakdown Spectroscopy Measurements

Castle, Bryan C.; Talabardon, K.; Smith, Benjamin W.; Winefordner, J. D.

doi:10.1366/0003702981944300

Cited by 166 publications

(78 citation statements)

References 9 publications

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“…Some authors have named this technique Time-Resolved Laser Induced Breakdown Spectroscopy (TRELIBS). 43,44 Modern detectors, described in the next section, based on ICCD technology are capable of achieving such temporal resolution and are contributing to make LIBS into a more useful analytical tool. With common lasers such as Nd:YAG and with pulse durations in the range of few nanoseconds, TRELIBS has become the most popular way to improve the analytical performance of the laser induced plasma spectrometry.…”

Section: Libs Analytical Signalmentioning

confidence: 99%

Laser Induced Breakdown Spectroscopy

Pasquini¹,

Cortez²,

Silva³

et al. 2007

J. Braz. Chem. Soc.

341

195

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Esta revisão descreve os aspectos fundamentais, a instrumentação, as aplicações e tendências futuras de uma técnica analítica que se encontra em seu estágio de consolidação e que está em vias de estabelecer o seu nicho entre as técnicas espectrofotométricas modernas. A técnica é denominada Espectroscopia de Emissão em Plasma Induzido por Laser (em inglês, Laser Induced Breakdown Spectroscopy, LIBS) e sua principal característica está no uso de pulsos de laser como fonte de energia para vaporizar a amostra e excitar a emissão de radiação eletromagnética, a partir de seus elementos e/ou fragmentos moleculares. A radiação emitida é analisada por meio de instrumentos ópticos de alta resolução e as suas intensidades são medidas, usualmente com detectores rápidos de estado sólido. Em conjunto, esses dispositivos permitem a geração e a medida de um espectro de emissão de faixa ampla do fenômeno induzido pelo pulso de laser. O espectro registrado contém informação qualitativa e quantitativa que pode ser correlacionada com a identidade da amostra ou empregada na determinação da quantidade de seus constituintes. Essa revisão é dividida em quatro partes. A primeira aborda aspectos históricos da técnica e os conceitos teóricos relevantes associados com LIBS; então, os aspectos práticos de diversas abordagens experimentais e instrumentais empregadas na implementação da técnica são revistos de forma crítica; as aplicações encontradas na literatura, incluindo aquelas que empregam quimiometria, são classificadas e exemplificadas por meio de trabalhos relevantes recentemente publicados. Finalmente, uma tentativa de estabelecer uma avaliação global e as perspectivas futuras para a técnica é apresentada.This review describes the fundamentals, instrumentation, applications and future trends of an analytical technique that is in its early stages of consolidation and is establishing its definitive niches among modern spectrometric techniques. The technique has been named Laser Induced Breakdown Spectroscopy (LIBS) and its main characteristic stands in the use of short laser pulses as the energy source to vaporize samples and excite the emission of electromagnetic radiation from its elements and/or molecular fragments. The emitted radiation is analyzed by high resolution optics and the intensities are recorded, usually by fast triggered solid state detectors. Together, these devices allow producing and registering a wide ranging emission spectrum of the short-lived phenomenon induced by the laser pulse. The spectrum contains qualitative and quantitative information which can be correlated with sample identity or can be used to determine the amount of its constituents. This review is divided in four parts. First, the relevant historical and theoretical concepts associated with LIBS are presented; then the main practical aspects of the several experimental and instrumental approaches employed for implementation of the technique are critically described; the applications related in the literature, including those making use of chemometri...

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Section: Libs Analytical Signalmentioning

confidence: 99%

Laser Induced Breakdown Spectroscopy

Pasquini¹,

Cortez²,

Silva³

et al. 2007

J. Braz. Chem. Soc.

341

195

View full text Add to dashboard Cite

show abstract

“…These parameters provide a better emission of ionic lines, for that reason these initial stages are better to acquire ionic lines despite the continuum emission. These optimal acquisition windows depend strongly on the sample material and both environmental and experimental conditions, but the values given above can be interesting as a starting point for each kind of laser [20].…”

Section: Plasma Emission Spectramentioning

confidence: 99%

“…and higher signalto-background ratio was found at a delay of approximately 6 µs. The integration time was fixed at 15 µs [20].…”

Section: Acquisition Time and Delaymentioning

confidence: 99%

Laser-Induced Breakdown Spectroscopy: Fundamentals, Applications, and Challenges

2012

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Laser-induced breakdown spectroscopy (LIBS) is a technique that provides an accurate in situ quantitative chemical analysis and, thanks to the developments in new spectral processing algorithms in the last decade, has achieved a promising performance as a quantitative chemical analyzer at the atomic level. These possibilities along with the fact that little or no sample preparation is necessary have expanded the application fields of LIBS. In this paper, we review the state of the art of this technique, its fundamentals, algorithms for quantitative analysis or sample classification, future challenges, and new application fields where LIBS can solve real problems.

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“…Among others, chemical and physical matrix effects between the different atomic species [4,5], shot-to-shot fluctuations of the laser pulse parameters (energy, duration, etc.) [6], influence of particles ejected from previous pulses [7], variations in the spatial shape of the plasma plume that affects the light collection efficiency of the spectrometer, and changes in surface conditions of the sample and the experimental setup and its environment in general have been identified as potential sources of errors in the quantitative sample evaluation [8].…”

Section: Introductionmentioning

confidence: 99%

Normalization of laser-induced breakdown spectroscopy spectra using a plastic optical fiber light collector and acoustic sensor device

et al. 2012

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To estimate the acoustic plasma energy in laser-induced breakdown spectroscopy (LIBS) experiments, a light collecting and acoustic sensing device based on a coil of plastic optical fiber (POF) is proposed. The speckle perturbation induced by the plasma acoustic energy was monitored using a CCD camera placed at the end of a coil of multimode POF and processed with an intraimage contrast ratio method. The results were successfully verified with the acoustic energy measured by a reference microphone. The proposed device is useful for normalizing LIBS spectra, enabling a better estimation of the sample's chemical composition.

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Variables Influencing the Precision of Laser-Induced Breakdown Spectroscopy Measurements

Cited by 166 publications

References 9 publications

Laser Induced Breakdown Spectroscopy

Laser Induced Breakdown Spectroscopy

Laser-Induced Breakdown Spectroscopy: Fundamentals, Applications, and Challenges

Normalization of laser-induced breakdown spectroscopy spectra using a plastic optical fiber light collector and acoustic sensor device

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