Improvement of reproducibility of trace analysis by spark-source mass-spectrometry

Pustovit, A. N.; Sikharulidze, G. G.

doi:10.1007/bf01196738

“…The foregoing results refute claims th a t other sources of poor reproducibility, such as geo metrical effects of the electrodes in the spark source (Y anagihari al. 1978;Pustovit & Sikharulidze 1981) cannot be eliminated. It is well known th at param eters such as spark gap and spark position affect the precision and the accuracy of the method (M agee & Harrison I973)* However, results indicate th at if adequate precautions are taken, relative standard deviations of the order of 5-10 % can be obtained (Skogerboe al.…”

Section: A Ccurate Analysismentioning

confidence: 99%

Recent advances in analytical spark source mass spectrometry

Adams

¹

1982

Phil. Trans. R. Soc. Lond. A

13

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Spark source mass spectrometry is an established technique for the chemical analysis of trace and minor inorganic constituents in many types of material. Its merits are its inherent high sensitivity with detection limits down to a few nanograms per gram and an extremely wide elemental coverage, i.e. essentially all the elements present in the sample. Drawbacks that explain its lesser popularity compared with other techniques result from (1) the complexity and cost of the apparatus, (2) the time-consuming operation when detection is performed with an ion emulsion, and (3) inaccuracies inherent in ion formation and the measurement process. A review will be given of the basic theory, the instrumentation and a few representative applications. Special reference will be made to recent advances in methodology (e.g. the development of multi-element isotope dilution) and instrumentation: the development of the understanding of the r.f. spark ion formation process, alternative mechanisms for ionization, and the exploitation of ion detectors other than the photographic plate (electrical detection with electron multipliers and position-sensitive detectors).

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“…Use of the ion intensity ratio of the analyte and internal standard from the same exposure in determining elemental concentrations can minimize the effect of spark variations (36). The effect of changes in the gap width and ion charge distribution can be minimized by stabilizing the intensities of the matrix lines (184). The positioning of the spark with respect to the entrance slit should be consistent (28,177).…”

Section: Photographic Detectionmentioning

confidence: 99%

“…The spark position determines what portion of the inhomogeneous spark plasma is sampled by the mass spectrograph (38,(175)(176)(177)179,180). Other factors concern variations in the ion current at the monitor (177,185) and the spark discharge with time caused by circuitry instability, aging, and other time related variations (171,184). Also, the vacuum in the ion source should be consistent (28).…”

Section: Photographic Detectionmentioning

confidence: 99%

Improvement in the analysis of ashes from coal by spark source mass spectrography

Welcomer

¹

0

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“…Use of the ion intensity ratio of the analyte and internal standard from the same exposure in determining elemental concentrations can minimize the effect of spark variations (36). The effect of changes in the gap width and ion charge distribution can be minimized by stabilizing the intensities of the matrix lines (184). The positioning of the spark with respect to the entrance slit should be consistent (28,177).…”

Section: Photographic Detectionmentioning

confidence: 99%

“…The spark position determines what portion of the inhomogeneous spark plasma is sampled by the mass spectrograph (38,(175)(176)(177)179,180). Other factors concern variations in the ion current at the monitor (177,185) and the spark discharge with time caused by circuitry instability, aging, and other time related variations (171,184). Also, the vacuum in the ion source should be consistent (28).…”

Section: Photographic Detectionmentioning

confidence: 99%

Improvement in the analysis of ashes from coal by spark source mass spectrography

Welcomer

¹

0

View full text Add to dashboard Cite

Improvement of reproducibility of trace analysis by spark-source mass-spectrometry

Cited by 6 publications

References 1 publication

Recent advances in analytical spark source mass spectrometry

Recent advances in analytical spark source mass spectrometry

Improvement in the analysis of ashes from coal by spark source mass spectrography

Improvement in the analysis of ashes from coal by spark source mass spectrography

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