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Related Concept Videos

Flame Photometry: Overview01:02

Flame Photometry: Overview

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Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...
892
Flame Photometry: Lab01:16

Flame Photometry: Lab

459
In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...
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Atomic Spectroscopy: Effects of Temperature01:27

Atomic Spectroscopy: Effects of Temperature

539
Atomization, converting samples into gas-phase atoms and ions, is essential for atomic spectroscopy. The flame temperature required for atomization affects the efficiency of the atomic spectroscopic methods by increasing the atomization efficiency and the relative population of the excited and ground states.
At thermal equilibrium, the relative populations of excited and ground state atoms can be estimated using the Maxwell–Boltzmann distribution. For example, an increase in temperature...
539
Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

286
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 Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

702
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.
702
Atomic Fluorescence Spectroscopy01:29

Atomic Fluorescence Spectroscopy

547
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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Updated: Oct 15, 2025

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown
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Flame Temperature Measurement Based on Laser-Induced Breakdown Spectroscopy and Element Doping.

Bin Tai1,2,3, Xiaojian Hao1,2,3, Jia Wang1,2,3

  • 1Science and Technology on Electronic Test and Measurement Laboratory, North University of China, Taiyuan, Shanxi Province 030051, China.

ACS Omega
|October 25, 2021
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Summary
This summary is machine-generated.

This study accurately measured temperature fields using spectral emissivity and laser-induced breakdown spectroscopy. The method, validated by infrared thermography, precisely maps temperature and emissivity distributions.

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Area of Science:

  • Thermodynamics and Spectroscopy
  • Optical Engineering
  • Materials Science

Background:

  • Accurate high-temperature field measurement is crucial for industrial processes and research.
  • Existing methods often face challenges in precision and real-time application.
  • Spectral emissivity calibration is key to reliable thermal measurements.

Purpose of the Study:

  • To develop and validate a novel method for accurate temperature field measurement.
  • To calibrate high-temperature measurement equipment using spectral emissivity.
  • To investigate the application of laser-induced breakdown spectroscopy in temperature field analysis.

Main Methods:

  • Designed calibration experiments using spectral emissivity of intrinsic element particles.
  • Employed laser-induced breakdown spectroscopy (LIBS) for element selection.
  • Utilized an element doping method to approximate the real temperature field.
  • Calibrated camera systems for temperature and spectral emissivity distribution calculations.

Main Results:

  • Successfully calculated temperature distribution and spectral emissivity distribution of a flame.
  • Demonstrated consistency between calculated values and infrared thermal imager data.
  • Verified the accuracy and reliability of the developed measurement technique.

Conclusions:

  • The proposed method provides accurate temperature field measurements.
  • LIBS combined with spectral emissivity calibration is effective for high-temperature diagnostics.
  • The technique offers a robust approach for validating thermal imaging systems.