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In inductively coupled plasma–mass spectrometry (ICP–MS), an inductively coupled plasma (ICP) torch is used as an atomizer and ionizer. Solid samples are dissolved and volatilized before being introduced into the high-temperature argon plasma, while solution samples are nebulized and passed through the high-temperature argon plasma. Plasma dissociates the analytes and ionizes their component atoms to form a mixture of positive ions and molecular species. The positive ions are then...
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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.
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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–mass spectrometry (ICP–MS) is a highly selective and sensitive technique for accurate elemental analysis. Though the analysis of ICP–MS mass spectra is comparatively straightforward, it is affected by spectroscopic and non-spectroscopic interferences. Spectroscopic interferences arise when the plasma contains ionic species with an m/z value the same as the analyte ion. Spectroscopic interference can be categorized as isobaric, polyatomic ions, and...
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Imaging Spectroscopy at the Plasma-Liquid Interface.

Daniel Tasche1,2, Kai Bröking1,2,3, Oliver Höfft4

  • 1Faculty of Engineering and Health, HAWK University of Applied Sciences and Arts, Von-Ossietzky-Strasse 99, 37085 Göttingen, Germany.

Applied Spectroscopy
|August 13, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed a new imaging spectrograph method to track reactions at the plasma-liquid interface (PLI). This technique offers insights into reaction dynamics and helps optimize plasma-driven chemical reactions.

Keywords:
Plasma–liquid interfaceUV–Vis spectroscopyimaging spectrographplasma reductionultraviolet–visible

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Area of Science:

  • Plasma Science
  • Chemical Kinetics
  • Spectroscopy

Background:

  • Understanding plasma-liquid interactions is crucial for various chemical processes.
  • Observing reaction product movement from the plasma-liquid interface (PLI) to the bulk is challenging.
  • Existing methods lack the spatiotemporal resolution to fully capture these dynamics.

Purpose of the Study:

  • To present a novel, simple, and cost-effective method for observing reaction product dynamics at the PLI.
  • To enable multidimensional tracking (spatial, spectral, temporal) of reactions.
  • To provide insights into reaction kinetics and mechanisms in plasma-liquid systems.

Main Methods:

  • Development and application of a direct vision imaging spectrograph.
  • Utilizing ultraviolet-visible (UV-Vis) absorption spectroscopy for data interpretation.
  • Analyzing spatial, spectral, and temporal data of reactions at the PLI.

Main Results:

  • Successful observation of reaction product movement from the PLI to the bulk.
  • Ability to calculate concentrations, determine production rates, and identify reaction pathways.
  • Demonstrated the imaging spectrograph's effectiveness in studying plasma-liquid dynamics.

Conclusions:

  • The developed imaging spectrograph method offers valuable insights into PLI dynamics.
  • This technique enhances the understanding of plasma-induced phenomena at liquid interfaces.
  • The findings pave the way for optimizing plasma-driven chemical reactions.