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The use of matrix-specific calibrations for oxygen in analytical glow discharge spectrometry.

Gonzalez-Gago C, Smid P, Hofmann T, Venzago C, Hoffmann V, Gruner W - Anal Bioanal Chem (2014)

Bottom Line: The importance of a "blue shifted" line of oxygen at 130.22 nm (first reported by Köster) for quantitative analyses by GD-OES is confirmed.Matrix-specific calibrations for oxygen in GD-MS are presented.Additional experiments using Ar-He mixtures or μs pulsed GD are carried out in ELEMENT GD aiming to improve the oxygen sensitivity.

View Article: PubMed Central - PubMed

Affiliation: Leibniz Institute for Solid State and Materials Research (IFW) Dresden, P.O. Box 270116, 01171, Dresden, Germany.

ABSTRACT
The performance of glow discharge optical emission spectroscopy and mass spectrometry for oxygen determination is investigated using a set of new conductive samples containing oxygen in the percent range in three different matrices (Al, Mg, and Cu) prepared by a sintering process. The sputtering rate corrected calibrations obtained at standard conditions for the 4 mm anode (700 V, 20 mA) in GD-OES are matrix independent for Mg and Al but not for Cu. The importance of a "blue shifted" line of oxygen at 130.22 nm (first reported by Köster) for quantitative analyses by GD-OES is confirmed. Matrix-specific calibrations for oxygen in GD-MS are presented. Two source concepts-fast flow (ELEMENT GD) and low gas flow (VG9000)-are evaluated obtaining higher sensitivity with the static flow source. Additional experiments using Ar-He mixtures or μs pulsed GD are carried out in ELEMENT GD aiming to improve the oxygen sensitivity.

No MeSH data available.


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Comparison of oxygen sensitivity in VG9000 and ELEMENT GD. The sintered Cu samples were measured in both instruments under optimum conditions (400 sccm, 50 mA for ELEMENT GD and 5 mA, 1 kV for VG9000)
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Fig7: Comparison of oxygen sensitivity in VG9000 and ELEMENT GD. The sintered Cu samples were measured in both instruments under optimum conditions (400 sccm, 50 mA for ELEMENT GD and 5 mA, 1 kV for VG9000)

Mentions: The respective sputtering rates were measured finding values 1 order of magnitude lower in the case of the VG9000. Nevertheless, the sensitivity obtained with such an instrument is more than six times higher than that in the ELEMENT GD (see Fig. 7). However, even the higher sensitivity of oxygen at the VG9000 is still quite low compared to metallic elements and therefore, the determination of matrix-specific sensitivity factors of oxygen is essential.Fig. 7


The use of matrix-specific calibrations for oxygen in analytical glow discharge spectrometry.

Gonzalez-Gago C, Smid P, Hofmann T, Venzago C, Hoffmann V, Gruner W - Anal Bioanal Chem (2014)

Comparison of oxygen sensitivity in VG9000 and ELEMENT GD. The sintered Cu samples were measured in both instruments under optimum conditions (400 sccm, 50 mA for ELEMENT GD and 5 mA, 1 kV for VG9000)
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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getmorefigures.php?uid=PMC4225055&req=5

Fig7: Comparison of oxygen sensitivity in VG9000 and ELEMENT GD. The sintered Cu samples were measured in both instruments under optimum conditions (400 sccm, 50 mA for ELEMENT GD and 5 mA, 1 kV for VG9000)
Mentions: The respective sputtering rates were measured finding values 1 order of magnitude lower in the case of the VG9000. Nevertheless, the sensitivity obtained with such an instrument is more than six times higher than that in the ELEMENT GD (see Fig. 7). However, even the higher sensitivity of oxygen at the VG9000 is still quite low compared to metallic elements and therefore, the determination of matrix-specific sensitivity factors of oxygen is essential.Fig. 7

Bottom Line: The importance of a "blue shifted" line of oxygen at 130.22 nm (first reported by Köster) for quantitative analyses by GD-OES is confirmed.Matrix-specific calibrations for oxygen in GD-MS are presented.Additional experiments using Ar-He mixtures or μs pulsed GD are carried out in ELEMENT GD aiming to improve the oxygen sensitivity.

View Article: PubMed Central - PubMed

Affiliation: Leibniz Institute for Solid State and Materials Research (IFW) Dresden, P.O. Box 270116, 01171, Dresden, Germany.

ABSTRACT
The performance of glow discharge optical emission spectroscopy and mass spectrometry for oxygen determination is investigated using a set of new conductive samples containing oxygen in the percent range in three different matrices (Al, Mg, and Cu) prepared by a sintering process. The sputtering rate corrected calibrations obtained at standard conditions for the 4 mm anode (700 V, 20 mA) in GD-OES are matrix independent for Mg and Al but not for Cu. The importance of a "blue shifted" line of oxygen at 130.22 nm (first reported by Köster) for quantitative analyses by GD-OES is confirmed. Matrix-specific calibrations for oxygen in GD-MS are presented. Two source concepts-fast flow (ELEMENT GD) and low gas flow (VG9000)-are evaluated obtaining higher sensitivity with the static flow source. Additional experiments using Ar-He mixtures or μs pulsed GD are carried out in ELEMENT GD aiming to improve the oxygen sensitivity.

No MeSH data available.


Related in: MedlinePlus