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Related Concept Videos

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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.
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

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.
Atomic Fluorescence Spectroscopy01:29

Atomic Fluorescence Spectroscopy

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 are...
Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

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...
Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

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...
Gas Chromatography: Types of Detectors-II01:19

Gas Chromatography: Types of Detectors-II

In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...

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Related Experiment Video

Updated: Jul 14, 2026

Automatic Laser-based Geometry Capture for Finite Element Analysis of Weld Beads
07:58

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Published on: July 25, 2025

Embedded spectroscopic fiber sensor for on-line arc-welding analysis.

Jesús Mirapeix1, Adolfo Cobo, Antonio Quintela

  • 1Grupo de Ingeniería Fotónica-Universidad de Cantabria E.T.S.I.I y Telecomunicación-Dpto. TEISA Avda., Los Castros s/n-39005 Santander, Spain. mirapeixjm@unican.es

Applied Optics
|May 22, 2007
PubMed
Summary

A novel fiber sensor system enables noninvasive, on-line spectroscopic analysis of arc-welding processes. This innovation improves quality assurance by efficiently capturing plasma light emission directly within the welding torch.

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Area of Science:

  • Materials Science and Engineering
  • Spectroscopy
  • Industrial Process Monitoring

Background:

  • Traditional methods for optical capture of arc-welding plasma emission are often invasive.
  • Existing approaches frequently rely on external optical devices like collimators or photodiodes, complicating integration.

Purpose of the Study:

  • To introduce a new, noninvasive fiber sensor system for spectroscopic analysis of arc-welding processes.
  • To enable on-line quality assurance through real-time plasma emission monitoring.

Main Methods:

  • An optical fiber is embedded within an arc-welding torch to capture plasma light emission.
  • The shielding gas is utilized to protect the fiber end, ensuring efficient light collection.
  • The collected optical information is delivered directly to a spectrometer.

Main Results:

  • The proposed fiber sensor system efficiently collects plasma light emission.
  • The system operates noninvasively, without hindering the welding operator.
  • Demonstrated feasibility for input optics in a welding quality-assurance system using plasma spectroscopy.

Conclusions:

  • The developed fiber sensor system offers a transparent and noninvasive solution for arc-welding monitoring.
  • This technology facilitates on-line quality assurance through plasma spectroscopy.
  • The system's integration within the welding torch represents a significant advancement in process control.