Determination of lanthanum by graphite furnace atomic absorption spectrometry with a tantalum platform

Skroce, Anna; McCormick, Malcolm J.; Meehan, Barry; Dolic, V.; Peverill, K. I.

doi:10.1016/0584-8547(93)80150-s

Cited by 7 publications

(2 citation statements)

References 6 publications

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“…As was mentioned above, for the determination of rare earth elements graphite atomizers are less suitable and in this case severe signal tailing is also seen with the THGA. These problems have been addressed for the determination of lanthanum by replacing the integrated platform with a curved tantalum foil [104]. With this, atomizer memory effects caused by carbide formation were negligible and m 0 for lanthanum was 220 pg compared with 7400 pg obtained with the standard system.…”

Section: Performance Characteristics Of State-of-the-art Sideheated Amentioning

confidence: 99%

Recent developments in atomizers for electrothermal atomic absorption spectrometry

Frech

1996

Analytical and Bioanalytical Chemistry

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This review first describes general requirements to be met for suitable base materials used to produce electrothermal atomizers (ETAs). In this connection the physical and chemical properties of adequate types of graphite and metals are discussed. Further, various atomizer designs, their temperature dynamics during atomization and general performance characteristics are critically reviewed. For end-heated Massmann-type atomizers, discussions are focused on recent developments of, e.g., contoured tubes to achieve improved temperature homogeneity over the tube length, second surface atomizers to realize temporally isothermal atomization and tubes with graphite filters to reduce interference effects. The state-of-the-art of platform equipped, side-heated atomizers with integrated contacting bridges are characterized mainly with respect to heating dynamics, as well as susceptibility to interference- and memory effects. In contrast to end-heated ETAs, the tube ends of side-heated ETAs are freely located in the furnace compartment and, as a consequence of this configuration, convective gas flows can easily appear. The magnitude and effect of these flows on analytical performance are discussed and measures are suggested, permitting operation under diffusion controlled conditions. A critical comparison of classical constant temperature atomizers with state-of-the-art platform equipped ETAs is made and from this it is concluded that future ETA developments are likely to involve only minor modifications aiming at, e.g., the reduction of cycling times or the improvement of tube surface properties.

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Section: Performance Characteristics Of State-of-the-art Sideheated Amentioning

confidence: 99%

Recent developments in atomizers for electrothermal atomic absorption spectrometry

Frech

1996

Analytical and Bioanalytical Chemistry

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show abstract

“…This eliminated interference by Al when Zn was determined in Al metal. A Ta platform (67), used in a graphite furnace, enabled La to be determined with improved sensitivity compared with a graphite platform. Ma et al (68) compared the lifetimes of W foil and La foil platforms used in graphite atomizers.…”

Section: Electrothermal Atomizationmentioning

confidence: 99%

Atomic Absorption, Atomic Emission, and Flame Emission Spectrometry

Jackson

Chen

1996

Anal. Chem.

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Vaporization and atomization of neodymium in graphite furnace atomic absorption spectrometry

Byrne¹,

Carambassis²

1996

Spectrochimica Acta Part B: Atomic Spectroscopy

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Determination of lanthanum by graphite furnace atomic absorption spectrometry with a tantalum platform

Cited by 7 publications

References 6 publications

Recent developments in atomizers for electrothermal atomic absorption spectrometry

Recent developments in atomizers for electrothermal atomic absorption spectrometry

Atomic Absorption, Atomic Emission, and Flame Emission Spectrometry

Vaporization and atomization of neodymium in graphite furnace atomic absorption spectrometry

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