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Related Concept Videos

Atomic Absorption Spectroscopy: Atomization Methods01:25

Atomic Absorption Spectroscopy: Atomization Methods

Atomic Absorption Spectroscopy (AAS) atomizes samples through flame atomization or electrothermal atomization. Flame atomization typically involves a nebulizer and spray chamber assembly to combine the sample with a fuel–oxidant mixture, creating a fine aerosol mist that enters a burner. Typically, the fuel and oxidant are combined in an approximately stoichiometric ratio. However, for atoms that are easily oxidized, a fuel-rich mixture may be more advantageous. Only about 5% of the aerosol...
Atomic Absorption Spectroscopy: Interference01:25

Atomic Absorption Spectroscopy: Interference

Interference leads to systematic error in atomic absorption (AA) measurements by enhancing or diminishing the analytical signal or the background. These interferences can be grouped into three main categories: spectral interference, chemical interference, and physical interference.
Spectral interference occurs when signals from other elements or molecules overlap with the analyte signal, falsely elevating or masking the analyte's absorbance. This interference can be corrected using Zeeman,...
Atomic Emission Spectroscopy: Interference01:30

Atomic Emission Spectroscopy: Interference

In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
Atomic Spectroscopy: Absorption, Emission, and Fluorescence01:23

Atomic Spectroscopy: Absorption, Emission, and Fluorescence

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...
Atomic Absorption Spectroscopy: Radiation and Light Sources01:13

Atomic Absorption Spectroscopy: Radiation and Light Sources

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...
Atomic Absorption Spectroscopy: Overview01:27

Atomic Absorption Spectroscopy: Overview

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.
When irradiated by EMR of a particular wavelength, these...

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Related Experiment Video

Updated: Jun 15, 2026

Scattering And Absorption of Light in Planetary Regoliths
11:34

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

Scattering and absorption by thin flat aerosols.

H Weil, C M Chu

    Applied Optics
    |March 12, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study uses an integral equation method to analyze how flat disk aerosols affect electromagnetic radiation scattering and absorption. Results show spectral and polarization effects for ice crystals comparable to radiation wavelengths.

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    Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
    15:06

    Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

    Published on: January 3, 2016

    Area of Science:

    • Atmospheric optics
    • Electromagnetic scattering theory
    • Aerosol science

    Background:

    • Aerosols significantly influence Earth's radiative balance.
    • Understanding scattering and absorption properties of nonspherical aerosols is crucial for climate modeling.
    • Flat disk aerosols, like ice crystals, present unique scattering challenges due to their shape and size relative to radiation wavelengths.

    Purpose of the Study:

    • To investigate spectral and polarization effects of electromagnetic radiation interacting with arbitrarily oriented flat disk aerosols.
    • To apply an integral equation method for accurate scattering and absorption calculations.
    • To present numerical results specifically for flat plate ice crystals.

    Main Methods:

    • Utilized an integral equation method to model electromagnetic radiation interaction.
    • Simulated scattering and absorption phenomena for aerosols with dimensions comparable to the radiation wavelength.
    • Focused on arbitrarily oriented flat disk aerosol models.

    Main Results:

    • The study quantifies spectral and polarization-dependent scattering and absorption efficiencies.
    • Numerical results demonstrate the influence of aerosol orientation and shape on radiative properties.
    • Specific data for flat plate ice crystals are provided, highlighting their optical behavior.

    Conclusions:

    • The integral equation method effectively captures complex scattering and absorption phenomena for flat disk aerosols.
    • Spectral and polarization effects are significant and depend strongly on aerosol morphology and orientation.
    • Findings contribute to more accurate remote sensing and climate simulations involving ice crystal aerosols.