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Related Concept Videos

Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

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Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
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Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

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AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...
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Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
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Atomic Emission Spectroscopy: Instrumentation01:22

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The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
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Atomic Spectroscopy: Absorption, Emission, and Fluorescence01:23

Atomic Spectroscopy: Absorption, Emission, and Fluorescence

3.1K
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...
3.1K
Atomic Absorption Spectroscopy: Overview01:27

Atomic Absorption Spectroscopy: Overview

3.2K
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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Highly automated electron energy-loss spectroscopy elemental quantification.

Raman D Narayan1, J K Weiss1, Peter Rez2

  • 11AppFive LLC,1095 West Rio Salado Parkway,Suite 110,Tempe,AZ 85281,USA.

Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada
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A new algorithm and user interface for electron energy-loss spectroscopy (EELS) fitting are presented. This method accurately models elemental composition and background, enabling quick elemental analysis for all users.

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Area of Science:

  • Materials Science
  • Spectroscopy
  • Analytical Chemistry

Background:

  • Electron energy-loss spectroscopy (EELS) is a powerful technique for materials analysis.
  • Accurate spectral fitting is crucial for reliable elemental composition determination.
  • Existing methods may have limitations in handling complex spectral features like plural scattering.

Purpose of the Study:

  • To introduce a novel model-based fitting algorithm for EELS spectra.
  • To develop an intuitive user interface for EELS spectral analysis.
  • To enable accurate elemental analysis, even for nonexpert users.

Main Methods:

  • A model-based fitting algorithm is applied to the measured EELS spectrum, not just the single scattering distribution.
  • An approximation is developed to maintain linearity in elemental composition parameters.
  • A method for modeling the low-loss background, including plural scattering, is incorporated.

Main Results:

  • The algorithm provides accurate modeling of EELS spectra over a wide range.
  • Linearity in elemental composition parameters is maintained.
  • The user interface demonstrates ease of use for rapid elemental analysis.

Conclusions:

  • The developed algorithm and user interface significantly improve EELS spectral fitting.
  • Nonexpert users can achieve quick and accurate elemental analysis results.
  • This approach enhances the accessibility and applicability of EELS for materials characterization.