Analysis of solids using laser-induced plasma spectroscopy in double-pulse mode

St‐Onge, L.; Sabsabi, Mohamad; Cielo, P.

doi:10.1016/s0584-8547(98)00080-9

Cited by 178 publications

(81 citation statements)

References 16 publications

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“…It generates the energy to induce the plasma and mainly determines the plasma features. The main parameters related to the laser are the pulse time (explained above), the energy per pulse, the wavelength, and the number of pulses per burst [24]. Obviously, each application works better with a combination of these parameters.…”

Section: Laser Configurations For Libsmentioning

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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Section: Laser Configurations For Libsmentioning

confidence: 99%

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

2012

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“…Improvements in the figures of merit by double-laser pulse configurations have contributed to better sensitivity and gain signal for LIBS analyses [24,25]. Several double-pulse geometric configuration approaches have been used consisting of either one laser [26], or two different lasers [27] to encompass a double-pulse LIBS setup.…”

Section: Double-pulse Libsmentioning

confidence: 99%

Wavelength Dependence on the Forensic Analysis of Glass by Laser Induced Breakdown Spectroscopy

Cahoon¹,

Almirall²

2009

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The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Laser Induced Breakdown Spectroscopy (LIBS) can be used for the chemical characterization of glass to provide evidence of an association between a fragment found at a crime scene to a source of glass of known origin. Two different laser irradiances, 266 nm and 1064 nm, were used to conduct qualitative and quantitative analysis of glass standards. Single-pulse and double-pulse configurations and lens-to-sample-distance (LTSD) settings were optimized to yield the best laser-glass coupling. Laser energy and acquisition timing delays were also optimized to ABSTRACTLaser Induced Breakdown Spectroscopy (LIBS) can be used for the chemical characterization of glass to provide evidence of an association between a fragment found at a crime scene to a source of glass of known origin. Two different laser irradiances, 266 nm and 1064 nm, were used to conduct qualitative and quantitative analysis of glass standards. Single-pulse and double-pulse configurations and lens-to-sample-distance (LTSD) settings were optimized to yield the best laser-glass coupling. Laser energy and acquisition timing delays were also optimized to result in the highest signal to noise ratio. The crater morphology was examined and the mass removed was calculated for both the 266 nm and 1064nm irradiations. The analytical figures of merit suggest that the 266 nm and 1064 nm wavelengths are capable of good performance for the forensic chemical characterization of glass. The results presented here suggest that the 266 nm laser produces a better laser-glass matrix coupling resulting in a better stoichiometric representation of the glass sample. The 266 nm irradiance is therefore recommended for the forensic analysis and comparison of glass samples.

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“…[7][8][9][10] In the literature, emission enhancements up to 10-fold have been demonstrated for neutral species with respect to standard LIBS. This enhancement has been explained by a combination of an increase of material ablation and plasma volume, and reheating by the second pulse.…”

Section: A Introductionmentioning

confidence: 99%

Investigation of resonance-enhanced laser-induced breakdown spectroscopy for analysis of aluminium alloys

Goueguel

Laville

Vidal

et al. 2010

J. Anal. At. Spectrom.

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Resonance-enhanced laser-induced breakdown spectroscopy (RELIBS) was investigated with the aim to improve the limit of detection of trace elements in the context of elemental analysis of aluminium alloys. A Q-switched Nd:YAG laser pulse (7 ns, 1064 nm) was used for ablation of the samples and was followed, after a suitable delay, by an Optical Parametric Oscillator (OPO) laser pulse (7 ns), tuned at 396.15 nm, to resonantly excite the aluminium host atoms. In particular, the Mg I 285.21 nm and Si I 288.16 nm lines were observed in the acquisition spectral window. We investigated the influence of the main experimental parameters, namely, the excitation wavelength, the interpulse delay and the ablation and excitation fluences, on the signal-to-noise ratio for the Mg I 285.21 nm line. We found that, at low ablation fluences, typically less than a few J cm À2 , the Mg signal at 285.21 nm achieved using RELIBS was significantly enhanced when compared to LIBS using the same ablation fluence. At fluences higher than 8 J cm À2 , the effect of the excitation pulse became unnoticeable and similar results were observed for both approaches. The optimum conditions were achieved for an interpulse delay of about 30 ns, an ablation fluence of about 3.8 J cm À2 and an excitation fluence of about 1.1 J cm À2 . The corresponding absolute LoDs were 0.7 and 50 fg, for Mg and Si, respectively, using RELIBS. When using LIBS, they were 4 and 128 fg, instead. Finally, the applicability of RELIBS in the context of a minimally destructive elemental analysis is discussed.

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Analysis of solids using laser-induced plasma spectroscopy in double-pulse mode

Cited by 178 publications

References 16 publications

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

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

Wavelength Dependence on the Forensic Analysis of Glass by Laser Induced Breakdown Spectroscopy

Investigation of resonance-enhanced laser-induced breakdown spectroscopy for analysis of aluminium alloys

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