Spatially resolved laser-induced fluorescence studies on a three-electrode direct current plasma

LeBlanc, Charles W.; Blades, Michael W.

doi:10.1039/ja9900500099

Cited by 12 publications

(2 citation statements)

References 41 publications

(52 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Both emission suppression and enhancement is observed, depending on the element, ionization stage, and spatial position. The effect appears to be due to a combination of ionization suppression and modification of the plasma-excitation conditions [40].…”

Section: A Plasma Characteristicsmentioning

confidence: 99%

“…The reason for this is related to the short analyte residence time and the inability of the analyte stream to penetrate the current-carrying plasma core. The analyte takes a path around the plasma, and excitation takes place at a boundary region adjacent to the high-density-plasma region [29], [40]_ Analyte emission line intensities in the DCP have been shown to be sensitive to the presence of easily ionized elements present in sample matrices. Both emission suppression and enhancement is observed, depending on the element, ionization stage, and spatial position.…”

Section: A Plasma Characteristicsmentioning

confidence: 99%

See 1 more Smart Citation

Application of weakly ionized plasmas for materials sampling and analysis

Blades

Banks

Gill

et al. 1991

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

Section: A Plasma Characteristicsmentioning

confidence: 99%

Section: A Plasma Characteristicsmentioning

confidence: 99%

Application of weakly ionized plasmas for materials sampling and analysis

Blades

Banks

Gill

et al. 1991

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

Laser Spectrometric Techniques in Analytical Atomic Spectrometry

Axner

Galbács

2012

Encyclopedia of Analytical Chemistry

View full text Add to dashboard Cite

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).

show abstract