Simultaneous Multielement Determinations by Atomic Absorption and Atomic Emission with a Computerized Echelle Spectrometer/Imaging Detector System

Felkel, Hugo L.; Pardue, Harry L.

doi:10.1021/bk-1979-0102.ch003

Cited by 4 publications

(1 citation statement)

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“…Geometric registration on the ISPD is excellent, 1 diode (Talmi and Simpson, 1980); therefore, wavelength accuracy was 0.5 nm with the 152 grooves/mm grating. Resolution was a function of the grating and the slit width and was empirically determined as the product of the reciprocal linear dispersion and the FWHM of one of the mercury lines (Felkel and Pardue, 1979). Experimentally determined resolution was: 2 nm using the 0.025 mm slit, 3 nm with the 0.1 mm slit, and with the 1 mm slit it was 9 nm using the fiber optic input and 20 nm using the lens system or no collection optics.…”

Section: Accuracy and Resolutionmentioning

confidence: 99%

Marine Bioluminescence Spectra Measured With an Optical Multichannel Detection System

Widder¹,

Latz²,

Case³

1983

The Biological Bulletin

137

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The emission spectra of 70 bioluminescent marine species were measured with a computer controlled optical multichannel analyzer (OMA). A 350 nm spectral window is simultaneously measured using a linear array of 700 silicon photodiodes, coupled by fiber optics to a microchannel plate image intensifier on which a polychromator generated spectrum is focused. Collection optics include a quartz fiber optic bundle which allows spectra to be measured from single photophores. Since corrections are not required for temporal variations in emissions, it was possible to acquire spectra of transient luminescent events that would be difficult or impossible to record with conventional techniques. Use of this system at sea on freshly trawled material and in the laboratory has permitted acquisition of a large collection of bioluminescence spectra of precision rarely obtained previously with such material. Among unusual spectral features revealed were organisms capable of emitting more than one color, including: Umbellula magniflora and Stachyptilum superbum (Pennatulacea), Parazoanthus lucificum (Zoantharia), and Cleidopus gloria-maris (Pisces). Evidence is presented that the narrow bandwidth of the emission spectrum for Argyropelecus affinis (Pisces) is due to filters in the photophores.

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Section: Accuracy and Resolutionmentioning

confidence: 99%

Marine Bioluminescence Spectra Measured With an Optical Multichannel Detection System

Widder¹,

Latz²,

Case³

1983

The Biological Bulletin

137

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Optical Multichannel Detection

bChang¹,

Long²

1982

Topics in Applied Physics

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Electron Number Density Measurements in Ar and Ar-N₂ Inductively Coupled Plasmas

Montaser

Fassel

1982

Appl Spectrosc

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The emission spectrum of the series limit of Al was used to estimate the electron number densities ( n e) in inductively coupled Ar or Ar-N2 plasmas (ICP). The spectra of the series limit were recorded either with a silicon-intensified target vidicon detector or by a computer-controlled, scanning spectrometer. Background stripping was performed on the spectra recorded by both instruments to enhance signal recovery. Under comparable experimental conditions, the n e values in the Ar-supported ICP were higher than those observed in Ar-N2 plasma, when pure N2 was used in the outer flow. However, the n e value of the Ar ICP under the conditions commonly used in analytical laboratories (15 mm observation height and 1200 W forward power) was comparable to that found in pure N2 outer flow, Ar-N2 plasmas operated under conditions (5 mm observation height and 3000 W forward power) suitable for exciting spectral lines of high excitation energies. Whereas the use of higher, carrier gas flows tended to reduce the n e values of the Ar ICP substantially, this trend was not observed for the pure N2 outer flow Ar-N2 plasma.

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Simultaneous Multielement Determinations by Atomic Absorption and Atomic Emission with a Computerized Echelle Spectrometer/Imaging Detector System

Cited by 4 publications

References 0 publications

Marine Bioluminescence Spectra Measured With an Optical Multichannel Detection System

Marine Bioluminescence Spectra Measured With an Optical Multichannel Detection System

Optical Multichannel Detection

Electron Number Density Measurements in Ar and Ar-N₂ Inductively Coupled Plasmas

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Simultaneous Multielement Determinations by Atomic Absorption and Atomic Emission with a Computerized Echelle Spectrometer/Imaging Detector System

Cited by 4 publications

References 0 publications

Marine Bioluminescence Spectra Measured With an Optical Multichannel Detection System

Marine Bioluminescence Spectra Measured With an Optical Multichannel Detection System

Optical Multichannel Detection

Electron Number Density Measurements in Ar and Ar-N2 Inductively Coupled Plasmas

Contact Info

Product

Resources

About

Electron Number Density Measurements in Ar and Ar-N₂ Inductively Coupled Plasmas