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Related Experiment Videos

Long path atomic/ionic absorption spectrometry in an inductively coupled plasma.

M A Mignardi1, B W Smith, J D Winefordner

  • 1Department of Chemistry, University of Florida, Gainesville 32611.

Analytical Chemistry
|March 15, 1990
PubMed
Summary
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A new "T-shaped" quartz bonnet design enhances atomic absorption spectrometry in inductively coupled plasma (ICP). This method improves analytical performance, offering a promising alternative for elemental analysis.

Area of Science:

  • Analytical Chemistry
  • Atomic Spectroscopy
  • Plasma Physics

Background:

  • Inductively coupled plasma (ICP) atomic absorption spectroscopy (AAS) is a widely used technique for elemental analysis.
  • Enhancing the absorption path length in ICP-AAS is crucial for improving sensitivity and detection limits.
  • Previous methods for increasing path length in ICP systems have faced challenges with stability and efficiency.

Purpose of the Study:

  • To develop and evaluate a novel water-cooled quartz "T-shaped" bonnet for ICP-AAS.
  • To investigate the impact of this design on atomic and ionic absorption path length.
  • To assess the analytical performance and figures of merit achieved with the new ICP configuration.

Main Methods:

  • Utilized a "T-shaped" quartz bonnet with water cooling in an ICP system.

Related Experiment Videos

  • Performed atomic and ionic absorption spectrometry using continuum and line sources.
  • Employed an ultrasonic nebulizer for sample introduction and a photodiode array for spectra collection.
  • Conducted plasma diagnostics to measure temperature and electron density within the bonnet.

    • Main Results:

    • The novel bonnet design successfully increased the atomic/ionic absorption path length in the ICP.
    • Low radio frequency powers (400-600 W) were sufficient, preventing bonnet cracking.
    • Analytical figures of merit demonstrated significant improvement over previous ICP-AAS attempts.
    • Performance approached that of traditional flame atomic absorption spectroscopy.

    Conclusions:

    • The water-cooled quartz "T-shaped" bonnet is an effective design for enhancing ICP-AAS.
    • This approach offers improved sensitivity and analytical performance for elemental determination.
    • The method presents a viable alternative to existing ICP-AAS configurations and flame AAS.