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Related Concept Videos

Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

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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 Emission Spectroscopy: Overview01:20

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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

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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

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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).
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Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle01:19

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Inductively coupled plasma (ICP) is the most widely used plasma source in atomic emission spectroscopy (AES), also known as Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The ICP source, or torch, consists of three concentric quartz tubes with argon gas flowing through them. A spark from a Tesla coil initiates the ionization of argon, generating a high-temperature plasma.
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
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Atomic Fluorescence Spectroscopy01:29

Atomic Fluorescence Spectroscopy

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Atomic fluorescence spectroscopy (AFS) is an analytical technique that involves the electronic transitions of atoms in a flame, furnace, or plasma being excited by electromagnetic (EM) radiation. When these atoms absorb energy, they become excited and subsequently release energy as they return to their original state. This emitted light, or "fluorescence," is observed at a right angle to the incident beam. Both absorption and emission processes transpire at distinct wavelengths, which...
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Computer simulation and modeling of glow discharge optical emission coded aperture elemental mapping.

Harsshit Agrawaal1, Gerardo Gamez1

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Analytica Chimica Acta
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A new method, Glow discharge Optical emission Coded Aperture elemental Mapping (GOCAM), enables rapid elemental mapping of nanoscale materials. This technique significantly reduces acquisition time, overcoming limitations of current methods for advanced material analysis.

Keywords:
Coded apertureCompressed sensingElemental mappingGlow discharge optical emission spectroscopyNanomaterials

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Area of Science:

  • Materials Science
  • Spectroscopy
  • Nanotechnology

Background:

  • Elemental mapping (EM) is crucial for analyzing solid samples across disciplines.
  • Existing EM techniques, including Glow discharge optical emission spectroscopy (GDOES) coupled with hyperspectral imaging (HSI), are limited by long acquisition times and sample consumption.
  • Faster HSI is needed to enable high-throughput GDOES for nanoscale materials analysis.

Purpose of the Study:

  • To develop a novel, rapid elemental mapping technique for solid samples.
  • To address the limitations of slow acquisition times and resolution loss in current EM methods, particularly for nanomaterials.

Main Methods:

  • Introduction of Glow discharge Optical emission Coded Aperture elemental Mapping (GOCAM), a technique utilizing compressive coded aperture spectral imaging.
  • Computer model simulations to optimize coded aperture parameters (element size, transmittance) for data fidelity.
  • Evaluation and comparison of compressed sensing reconstruction algorithms, with SeSCIGPU showing superior performance.

Main Results:

  • Simulations indicate optimal data fidelity with smaller mask element sizes and 60% transmittance.
  • SeSCIGPU outperformed other tested reconstruction algorithms (TwIST, GAP-TV, SeSCICPU, ADMM-TV) in fidelity.
  • The study demonstrates the feasibility of GOCAM for single-exposure multi-elemental mapping.

Conclusions:

  • GOCAM is a feasible technique for rapid elemental mapping.
  • The developed method provides a foundation for future hardware development.
  • GOCAM has the potential to revolutionize nanostructured materials characterization by enabling sub-second multi-elemental mapping.