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Related Concept Videos

Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

3.5K
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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Electron Affinity03:07

Electron Affinity

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The electron affinity (EA) is the energy change for adding an electron to a gaseous atom to form an anion (negative ion).
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Atomic Absorption Spectroscopy: Lab01:21

Atomic Absorption Spectroscopy: Lab

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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 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...
884
Atomic Emission Spectroscopy: Interference01:30

Atomic Emission Spectroscopy: Interference

587
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,...
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Related Experiment Video

Updated: Jan 12, 2026

Quantitative Atomic-Site Analysis of Functional Dopants/Point Defects in Crystalline Materials by Electron-Channeling-Enhanced Microanalysis
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Enhanced sensitivity for electron affinity measurements of rare elements.

F M Maier1,2,3,4, E Leistenschneider5,6, M Au7

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Researchers developed a new laser spectroscopy method to measure electron affinity (EA) using fewer atoms. This breakthrough enables precise EA determination for rare and superheavy elements, advancing chemical reactivity studies.

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Area of Science:

  • Atomic Physics
  • Quantum Chemistry

Background:

  • Electron affinity (EA) is crucial for understanding atomic properties and chemical reactivity.
  • Current methods struggle with low sample quantities, leaving heavy elements' EAs unknown.

Purpose of the Study:

  • To develop a highly sensitive technique for measuring electron affinity.
  • To enable EA determination for scarce atomic samples, including superheavy elements.

Main Methods:

  • Utilized Laser Photodetachment Threshold Spectroscopy.
  • Employed an electrostatic ion beam trap to enhance photon-sample interaction.
  • Achieved increased signal sensitivity by three orders of magnitude.

Main Results:

  • Measured the electron affinity of 35Cl with state-of-the-art precision: 3.612720(44) eV.
  • Required five orders of magnitude fewer anions compared to conventional methods.
  • Demonstrated a novel technique applicable to isotopic chains and superheavy elements.

Conclusions:

  • The new technique significantly enhances sensitivity for electron affinity measurements.
  • Enables systematic studies of isotopic shifts and hyperfine splittings.
  • Opens the door for the first direct electron affinity measurements of superheavy elements.