Reduction of the matrix influence on analytical signal in laser-enhanced ionization spectrometry with laser sampling

Gorbatenko, A. A.; Лабутин, Т.А.; Popov, A. M.; Зоров, Н. Б.

doi:10.1016/j.talanta.2005.12.009

Cited by 10 publications

(2 citation statements)

References 12 publications

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“…Based on simulations and experiments, Wineford and co-workers [58,59] suggest that plasma asymmetry can have an effect on the observed emission spectra depending on the light collecting geometry or angle of view. Plume asymmetry (i.e., non-spherical) is expected at reduced pressures [52], but can also occur with DP-LIBS [60].…”

Section: Dp-libs Inmentioning

confidence: 99%

Effect of atmosphere on collinear double-pulse laser-induced breakdown spectroscopy

Effenberger

Scott

2011

Anal Bioanal Chem

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Double-pulse laser-induced breakdown spectroscopy (DP-LIBS) has been shown to enhance LIBS spectra. Several researchers have reported significant increases in signal-to-noise (S/N) and/or spectral intensity compared to single-pulse (SP) LIBS. In addition to DP-LIBS, atmospheric conditions can also increase sensitivity. Thus, in this study, a collinear DP-LIBS scheme was used along with manipulation of the atmospheric conditions. The DP-LIBS scheme consisted of an initial 45 mJ pulse at 1064 nm fired into a sample contained in a controlled atmospheric/vacuum chamber. A second analytical 45 mJ pulse at 1064 nm was then fired 0 to 200 μs after and along the same path of the first pulse. Ar, He, and air at pressures ranging from atmospheric pressure to 1 Torr are introduced during DP-LIBS and SP-LIBS experiments. For a brass sample, significant increases in the spectral intensities of Cu and Zn lines were observed in DP-LIBS under Ar compared to DP-LIBS in air. It was also found that Cu and Zn lines acquired with SP-LIBS in Ar are nearly as intense as DP-LIBS in air. While collinear DP-LIBS is effective for increasing the sensitivity for some reduced atmospheres (i.e., Ar and air at 630 to 100 Torr and He at 300 Torr), the enhanced spectral intensity ultimately dropped off as the pressure was reduced below 10 Torr for all atmospheric compositions in the experimental arrangement used in this study. At all pressures of air and Ar, the plasma temperature remained rather constant with increased inter-pulse delays; however, the plasma temperature was more variable for different He gas pressures and inter-pulse delays.

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Section: Dp-libs Inmentioning

confidence: 99%

Effect of atmosphere on collinear double-pulse laser-induced breakdown spectroscopy

Effenberger

Scott

2011

Anal Bioanal Chem

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“…The technique would function well as a detector in a GC or HPLC system. Gorbatenko et al 322 have reduced the matrix effect in LEI by using the slope of a correlation line generated by LEI of lithium versus the laser-induced atomic emission of aluminium. Aluminium alloys containing copper, scandium, and lithium were used to illustrate the matrix effect, which uncorrected makes them unsuitable for calibration.…”

Section: Laser Enhanced Ionization (Lei)mentioning

confidence: 99%

Atomic spectrometry update. Advances in atomic emission, absorption and fluorescence spectrometry, and related techniques

Evans¹,

Day²,

Palmer³

et al. 2007

J. Anal. At. Spectrom.

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Laser Spectrometric Techniques in Analytical Atomic Spectrometry

Axner

Galbács

2012

Encyclopedia of Analytical Chemistry

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The main purpose of this article is to describe the theory, instrumentation, and analytical performance of laser analytical atomic spectrometry, focusing on absorption, fluorescence, and ionization techniques. The structure of the article is such that it first provides an outline of the theory of light‐matter interactions that prevail for each type of technique as well as of the most common modulation techniques, primarily, wavelength modulation (WM). This is followed by a section that covers the most important types of instrumentation used. The article finally provides a detailed discussion on the specific instrumentation, mode of operation, use, performance, and applications (both analytical and diagnostic) of each technique. In terms of laser atomic absorption, the focus of the discussion is on the use of approaches to enhance the detection capability by either reducing the amount of noise (as is done by the wavelength modulation absorption spectrometry (WMAS) technique) or by providing an extended interaction length (giving rise to cavity‐enhanced absorption spectrometry (CEAS) techniques in general, and cavity ring‐down spectrometry (CRDS) in particular). Laser atomic fluorescence techniques (often referred to as laser‐excited atomic fluorescence spectrometry ( LEAFS )) as well as laser ionization techniques (termed either laser‐enhanced ionization ( LEI ) or resonance ionization spectrometry ( RIS )) are also covered in some detail. It is shown that several of these techniques are capable of detecting a variety of elements in liquid samples down to low picogram per milliliter (pg mL −1 ) or parts‐per‐trillion (ppt) concentrations and in low femtogram amounts. Also other properties of the techniques, e.g. selectivity and linear dynamic range (LDR), are in general superior to those of conventional (nonlaser‐based techniques).

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Reduction of the matrix influence on analytical signal in laser-enhanced ionization spectrometry with laser sampling

Cited by 10 publications

References 12 publications

Effect of atmosphere on collinear double-pulse laser-induced breakdown spectroscopy

Effect of atmosphere on collinear double-pulse laser-induced breakdown spectroscopy

Atomic spectrometry update. Advances in atomic emission, absorption and fluorescence spectrometry, and related techniques

Laser Spectrometric Techniques in Analytical Atomic Spectrometry

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