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Related Concept Videos

Atomic Absorption Spectroscopy: Radiation and Light Sources01:13

Atomic Absorption Spectroscopy: Radiation and Light Sources

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Atomic absorption spectroscopy (AAS) relies on the Beer-Lambert law, which requires that the radiation source emits a narrow range of wavelengths to match the absorption characteristics of the analyte atom. The primary criteria for choosing an appropriate radiation source in AAS is to provide a precise and intense emission at specific wavelengths that will allow accurate detection of the analyte.
Two common narrow-range 'line' sources used in AAS are hollow-cathode lamps (HCLs) and...
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Atomic Absorption Spectroscopy: Overview01:27

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Atomic absorption spectroscopy (AAS) is a technique used to analyze elements by measuring electromagnetic radiation (EMR) absorbed by atoms, which causes them to transition to a higher-energy orbit. The most crucial step in AAS is atomization, where the analyte is converted into gas-phase atoms, typically through a flame or furnace. Some of these atoms become thermally excited in the flame, while most remain in the ground state.
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Atomic Absorption Spectroscopy: Lab01:21

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For AAS measurements, samples must be introduced as clear solutions, often requiring extensive preliminary treatment to dissolve materials like soils, animal tissues, and minerals. Common methods for sample preparation include treatment with hot mineral acids, wet ashing, combustion in closed containers, high-temperature ashing, or fusion with reagents.
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Atomic Spectroscopy: Absorption, Emission, and Fluorescence01:23

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Atomic spectroscopy is a vital tool in elemental analysis, both qualitatively and quantitatively. It can be broadly divided into optical spectroscopy, mass spectroscopy, and X-ray spectroscopy methods. The optical spectroscopic methods are atomic absorption spectroscopy (AAS), atomic emission spectroscopy (AES), and atomic fluorescence spectroscopy (AFS). The first step in all three methods is atomization, where the solid, liquid, or solution-phase samples are converted into gas-phase atoms and...
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Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

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An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
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Related Experiment Video

Updated: Mar 30, 2026

Dependence of Laser-induced Breakdown Spectroscopy Results on Pulse Energies and Timing Parameters Using Soil Simulants
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Self-absorption reduction in laser-induced breakdown spectroscopy using laser-stimulated absorption.

Jia-Ming Li, Lian-Bo Guo, Chang-Mao Li

    Optics Letters
    |November 14, 2015
    PubMed
    Summary

    Laser-induced breakdown spectroscopy (LIBS) faces self-absorption challenges. A new method, laser-stimulated absorption (LSA-LIBS), effectively reduces this effect for improved spectral analysis.

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    Area of Science:

    • Spectroscopy
    • Atomic Emission Spectroscopy
    • Laser-Based Analytical Techniques

    Background:

    • Self-absorption is a major limitation in laser-induced breakdown spectroscopy (LIBS).
    • This phenomenon distorts spectral line intensities and broadens spectral features.
    • Accurate elemental analysis using LIBS is hindered by self-absorption effects.

    Purpose of the Study:

    • To introduce and validate a novel approach, laser-stimulated absorption (LSA-LIBS), for mitigating self-absorption in LIBS.
    • To investigate the mechanism by which LSA reduces self-absorption.
    • To quantify the reduction in self-absorption for specific elements.

    Main Methods:

    • Implementation of laser-stimulated absorption (LSA) in conjunction with the LIBS technique.
    • Experimental analysis of spectral lines exhibiting self-absorption phenomena.
    • Measurement of spectral line characteristics, including full width at half-maximum (FWHM).

    Main Results:

    • The LSA-LIBS technique successfully eliminated observable self-absorption for potassium (K), manganese (Mn), and aluminum (Al) spectral lines.
    • Significant reductions in the full width at half-maximum (FWHM) were achieved: 58% for K, 25% for Mn, and 52% for Al.
    • The experimental results confirm the efficacy of LSA in suppressing self-absorption.

    Conclusions:

    • Laser-stimulated absorption (LSA-LIBS) is a viable method for overcoming the self-absorption bottleneck in LIBS.
    • This technique offers improved spectral quality and accuracy for elemental analysis.
    • LSA-LIBS demonstrates significant potential for enhancing LIBS applications.