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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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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 Absorption Spectroscopy: Atomization Methods01:25

Atomic Absorption Spectroscopy: Atomization Methods

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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...
396
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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Atomic Spectroscopy: Absorption, Emission, and Fluorescence01:23

Atomic Spectroscopy: Absorption, Emission, and Fluorescence

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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 Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

363
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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Attosecond ionic photoionization spectroscopy.

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    Advanced attosecond photoelectron spectroscopy now has an alternative. Ion interferometry can now resolve ultrafast photoionization, matching electron spectroscopy

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    Area of Science:

    • Atomic and molecular physics
    • Ultrafast science
    • Quantum optics

    Background:

    • Photoionization is a fundamental light-matter interaction.
    • Attosecond photoelectron spectroscopy characterizes ultrafast photoemission.
    • Residual ions can record photoionization dynamics.

    Purpose of the Study:

    • To demonstrate attosecond ion interferometry as an alternative to photoelectron spectroscopy.
    • To develop high-resolution ion momentum detection for attosecond measurements.
    • To resolve ultrafast photoionization dynamics using ion scattering.

    Main Methods:

    • Attosecond ion reconstruction of attosecond beating by interference of two-photon transition (RABBIT)-like interferometry.
    • High-resolution ion momentum detection.
    • Atomic photoionization experiments.

    Main Results:

    • Experimental illustration of attosecond ion interferometry.
    • Observation of identical momentum- and time-dependent scattering phase shifts as in photoelectron spectroscopy.
    • Demonstration of ion interferometry as a viable attosecond chronoscope.

    Conclusions:

    • Ion interferometry provides an alternative attosecond approach to studying photoionization.
    • This method overcomes the electron homogeneity limitation of photoelectron spectroscopy.
    • Attosecond ion dynamics can be precisely reconstructed.