Study of matrix effects in laser induced breakdown spectroscopy on metallic samples using plasma characterization by emission spectroscopy

Aguilera, J.A.; Aragón, C.; Madurga, V.; Manrique, J. A.

doi:10.1016/j.sab.2009.07.007

Cited by 61 publications

(33 citation statements)

References 17 publications

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“…plasma temperature and electron number density). It was suggested by Aguilera et al [129] that the volume of the plasma region observed and the total number of atoms in this volume also have to be considered when characterizing matrix effects or optimizing for their minimization. It is also worth pointing out that signal normalization using these same reference signals is also used with the purpose of improving the repeatability of LIBS signals, as was discussed in an earlier section.…”

Section: Quantitative Analysismentioning

confidence: 99%

A critical review of recent progress in analytical laser-induced breakdown spectroscopy

Galbács

2015

Anal Bioanal Chem

173

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Laser-induced breakdown spectroscopy (LIBS) has become an established analytical atomic spectrometry technique and is valued for its very compelling set of advantageous analytical and technical characteristics. It is a rapid, versatile, non-contact technique, which is capable of providing qualitative and quantitative analytical information for practically any sample, in a virtually non-destructive way, without any substantial sample preparation. The instrumentation is simple, robust, compact, and even enables remote analysis. This review attempts to give a critical overview of the diverse progress of the field, focusing on the results of the last five years. The advancement of LIBS instrumentation and data evaluation is discussed in detail and selected results of some prominent applications are also described.

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Section: Quantitative Analysismentioning

confidence: 99%

A critical review of recent progress in analytical laser-induced breakdown spectroscopy

Galbács

2015

Anal Bioanal Chem

173

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“…Esto se debe al ensanchamiento de las líneas debida a la recombinación del H y el C en el propio plasma, así como a la disminución en la intensidad de dichas líneas cuando el plasma es producido a presión atmosférica (Aguilera et al 2009) (Aragón and Aguilera 2008).…”

Section: Resultsunclassified

Análisis de plasmas inducidos por láser con excitación multipulso para el proceso de ablación de areolas de Tuna

Flores

Ponce

Rodríguez

et al. 2014

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Análisis de plasmas inducidos por láser con excitación multipulso para el proceso de ablación de areolas de TunaLaser-induced breakdown spectroscopy analysis with multi-pulse excitation for ablation process of tuna areolas seguimiento en tiempo real de un proceso de ablación láser, incluso para muestras de composición compleja. Para el monitoreo de un proceso industrial, esta herramienta sería más adecuada, si se cuenta con una calibración del equipo y un protocolo particular definido. En el trabajo, se ejemplifica esta posibilidad para el caso de la ablación láser de areolas de Tuna (fruto de el Opuntia ficus-indica).Método: Se realiza el análisis LIBS de muestras de tuna, tanto en las areolas como en la corteza.Para la excitación del plasma se emplea un láser de Nd:YAG en régimen de Q:Switch con tren de pulsos. Con el objeto de asegurar el reconocimiento de las líneas en los espectros LIBS, se realizaron análisis en patrones de composición conocida, estableciéndose un protocolo para la interpretación de los espectros.Resultados: Se logró una clara lectura de la línea de H ubicada en 656.2 nm. Se estableció un protocolo para la interpretación de los espectros, que permitió la identificación de 49 picos característicos. Finalmente, se determina la composición para la corteza y la areola y se lleva a cabo una comparación cualitativa entre éstas.Discusión: Se muestra que la excitación láser en forma de tren de pulsos, entendido este régimen como modalidad particular del Q:Switch, permite la determinación eficiente de elementos, con una adecuada relación señal-ruido. Por otra parte, que es posible determinar diferencias composicionales evidentes entre corteza y la areola, lo cual permite monitorear un proceso de ablación de areolas con láser de manera simple.Palabras claves: Opuntia, plasma, láser, LIBS. Recepción: 16-02-10Aceptación: 04-03-10 Method:The LIBS analysis of tuna samples takes place, both in the areola and in the cortex. For the plasma excitation we uses a Nd: YAG laser with special Q:Switch scheme: The pulse train emission regime. In order to guarantee the lines recognition in the LIBS spectra, before experiments widh samples, we takes the spectrum of well known composition standarts, establishing a protocol for the interpretation of spectra.Results: A clear reading for the H line located at 656.2 nm was obtained. A simple protocol was established for the spectra interpretation, which allowed the identification of 49 characteristic peaks. Finally, the composition to the cortex and the areola were determined and carried out a qualitative comparison between them. Discussion or Conclusion:The results shows that the laser excitation in pulse train form, understood as a particular form of Q: Switch regime, provides an intense plasma emission and efficient elements determination, with adequate signal to noise ratio. Moreover, it is possible to identify compositional differences between crust and areola, which can permits to track the laser ablation of areolas process in a simple way.

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“…This is an observed dependence of the intensity of the LIBS emission response to the nature of the material analysed (Eppler et al, 1996), which manifests as variations in laser-target coupling and resultant plasma intensity variations. These two facets of the sample, which are generally lumped together as "matrix effects" (Aguilera et al, 2009;Corsi et al, 2000;Ctvrtnickova et al;Lu et al, 2010;Ma et al;Mohamed, 2008;Shen et al, 2009;Windom & Hahn, 2009), will determine LIBS signal reproducibility, namely sample composition and sample surface character.…”

Section: Resultsmentioning

confidence: 99%

Burst Mode Q:switched Laser Pulses for Plasma Excitation in LIBS Analysis

Ponce¹,

Moreira²,

Posada³

et al. 2010

Laser Pulse Phenomena and Applications

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Study of matrix effects in laser induced breakdown spectroscopy on metallic samples using plasma characterization by emission spectroscopy

Cited by 61 publications

References 17 publications

A critical review of recent progress in analytical laser-induced breakdown spectroscopy

A critical review of recent progress in analytical laser-induced breakdown spectroscopy

Análisis de plasmas inducidos por láser con excitación multipulso para el proceso de ablación de areolas de Tuna

Burst Mode Q:switched Laser Pulses for Plasma Excitation in LIBS Analysis

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