Glow discharge mass spectrometric analysis of non-conducting materials

Tong, S. L.; Harrison, W. W.

doi:10.1016/0584-8547(93)80108-7

Cited by 39 publications

(11 citation statements)

References 17 publications

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“…glow discharge ion source [11,12], but these systems are not yet commercially available. For the analysis of non-conducting samples the widely used technique for the sample preparation consists of blending the sample material with a conductive host matrix [13][14][15]. For environmental samples silver powder is mixed with the sample material and then the homogenized mixture is pressed into the shape of a pin electrode [6,7].…”

Section: Resultsmentioning

confidence: 99%

Detection of trace radioisotopes in soil, sediment and vegetation by glow discharge mass spectrometry

Betti

Giannarelli

Hiernaut

et al. 1996

Analytical and Bioanalytical Chemistry

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The possibility for the determination of some radioisotopes of cesium, strontium, plutonium, uranium and thorium by glow discharge mass spectrometry (GDMS) in soils, sediments and vegetations is investigated. The preparation of samples is described as a combination of the use of a conductive host matrix and a secondary cathode in order to decrease the dilution effect of the blending material for the trace level determination and to gain a stable discharge. Effects of interferences arising from the nature of the conductive host matrix and of the secondary cathode on the sensitivity of the method are discussed. The determination of (137)Cs and (90)Sr has been attempted and the results obtained were in agreement with those from other analytical techniques. Accuracy, internal and external precisions have been also evaluated. GDMS is shown to be a helpful technique for the determination of radioisotopes in environmental samples. Radioisotopes can be determined according to the matrix of the sample (e.g. grass), also in presence of isobaric interferences. However, limitations still exist on the application of GDMS.

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Section: Resultsmentioning

confidence: 99%

Detection of trace radioisotopes in soil, sediment and vegetation by glow discharge mass spectrometry

Betti

Giannarelli

Hiernaut

et al. 1996

Analytical and Bioanalytical Chemistry

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“…Moreover, powder samples can be pressed with a binder in a suitable form, and even nonconducting powdered samples can be analysed either directly or after mixing with a conducting host matrix; for instance with a powder or very pure ductile solid, such as graphite, gallium or indium. [69][70][71][72][73] …”

Section: Technical Backgroundmentioning

confidence: 98%

Glow Discharge Mass Spectrometry

Venzago

Pisonero

2014

Sector Field Mass Spectrometry for Elemental and Isotopic Analysis

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GDMS is based on a glow discharge ion source, which generates ions through sputtering (cathodic sputtering) of a solid surface and ionisation (electron impact or Penning ionisation) by a glow discharge plasma. A glow discharge plasma is formed by the passage of an electric current through a low-pressure gas. The ions are separated in a mass spectrometer and finally recorded at a detector. GDMS is a method for the direct determination of trace elements in solid states providing traceelement information of solid samples. Beside the direct current (DC) mode, analytical glow discharges can also be operated in a radiofrequency (RF) mode, most often applied for analysis of nonconducting samples (Figures 13.1 and 13.2).

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“…R.f.-powered glow discharges allow the direct analysis of nonconducting solid samples,34 whereas such materials must be compacted with a conducting host matrix prior to analysis employed a d.c.-powered glow discharge. 35 Although commercially available GDMS systems exclusively employ the simpler d.c.-powered glow discharge at present it is expected that r.f.-GDMS systems will be made available to meet demands for the analysis of non-conducting materials.…”

Section: Instrumentationmentioning

confidence: 99%

Special feature: Tutorial. Glow discharge mass spectrometry: Trace element determinations in solid samples

1995

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Glow discharge mass spectrometry (GDMS) is a mature, versatile technique for the direct determination of trace elements in a variety of materials. The technique is an extension of the earliest forms of mass spectrometry. Processes inherent to the glow discharge, namely cathodic sputtering coupled with Penning ionization, yield an ion population from which semi-quantitative results can be directly obtained. QuantiÐcation in GDMS is achieved both through standard elemental mass spectrometric procedures and more innovative approaches. The analytical performance of GDMS compares favorably with competing elemental mass spectrometric methods and newer experiments use this ionization method for both molecular and elemental analysis. As with any analytical technique, the future of GDMS lies in improvements with respect to instrumental implementation and extension to new areas of application. If the method is to remain competitive, commercial GDMS systems must incorporate advances in mass spectrometric technology to increase analytical performance while decreasing the size, complexity and cost of the technique. Continued e †orts to develop improved quantitation procedures are needed to provide greater accuracy. The method should continue to mature as sustained e †orts demonstrate its utility in the solution of new and more varied problems.

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Glow discharge mass spectrometric analysis of non-conducting materials

Cited by 39 publications

References 17 publications

Detection of trace radioisotopes in soil, sediment and vegetation by glow discharge mass spectrometry

Detection of trace radioisotopes in soil, sediment and vegetation by glow discharge mass spectrometry

Glow Discharge Mass Spectrometry

Special feature: Tutorial. Glow discharge mass spectrometry: Trace element determinations in solid samples

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