Parametric study of a fiber-optic laser-induced breakdown spectroscopy probe for analysis of aluminum alloys

Awadhesh, K.; Zhang, Hansheng; Yueh, Fang‐Yu; Singh, Jagdish P.; Weisberg, Arel

doi:10.1016/s0584-8547(01)00299-3

Cited by 87 publications

(40 citation statements)

References 14 publications

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“…Rai et al 130,213,214 designed a fiber-optic LIBS system (FO-LIBS) aiming at on-line analyses of molten aluminum. A prototype was developed and its performance compared with the performance of a conventional LIBS system (without the utilization of fiber optics to deliver the laser beam).…”

Section: Alloys and Metallurgic Samplesmentioning

confidence: 99%

“…influence of laser power on fiber damage, effect of laser power variation with time), and effects of the surrounding atmosphere and focal lengths, among other, were studied. 213 The instrument was then employed to acquire spectra of solid samples and molten alloy. 130,214 The probe, containing the collimating and focusing optics was introduced into the melt which reached a final temperature of 800 ºC in atmosphere of argon.…”

Section: Alloys and Metallurgic Samplesmentioning

confidence: 99%

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Laser Induced Breakdown Spectroscopy

Pasquini¹,

Cortez²,

Silva³

et al. 2007

J. Braz. Chem. Soc.

342

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: Alloys and Metallurgic Samplesmentioning

confidence: 99%

Section: Alloys and Metallurgic Samplesmentioning

confidence: 99%

Laser Induced Breakdown Spectroscopy

Pasquini¹,

Cortez²,

Silva³

et al. 2007

J. Braz. Chem. Soc.

342

195

View full text Add to dashboard Cite

show abstract

“…In these situations or when the environment is too aggressive or the access restriction makes it difficult to induce the plasma or acquire the light, fiber optic cables (FOCs) or bundles are used [44][45][46]. Although the most common optical fibers in LIBS are made of fused silica (with diameters between 50 µm and 1 mm), different kinds of fibers such as photonic-crystal fibers are used too [47].…”

Section: Optical Fibersmentioning

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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“…Commonly, LIBS is used to determine the elemental composition of materials by calibration curves that require several reference samples with the same matrices [12][13][14]. This method requires that the measurement conditions of the reference samples match with the measurement conditions of the objects analyzed.…”

Section: Introductionmentioning

confidence: 99%