Related Experiment Video
Updated: Jun 28, 2026
10:04
Flame Experiments at the Advanced Light Source: New Insights into Soot Formation Processes
Published on: May 26, 2014
Some optical studies with the air-acetylene flame.
K M Aldous1, R F Browner, D Clark
1Chemistry Department, Imperial College, London S.W.7 2AY, U.K.
Talanta
|August 1, 1972
Summary
Schlieren and shadowgraph techniques offer valuable insights into premixed flame processes. This information can be correlated with atomic-absorption and flame-emission spectrometry signals for enhanced analysis.
Area of Science:
- Optical diagnostics
- Combustion science
- Spectroscopy
Background:
- Schlieren and shadowgraph imaging are optical techniques used to visualize variations in refractive index.
- Flame processes, particularly premixed flames, are complex and require advanced diagnostic methods for study.
- Atomic-absorption and flame-emission spectrometry are established analytical techniques for elemental analysis in flames.
Purpose of the Study:
- To discuss the application of Schlieren and shadowgraph techniques for studying premixed flame processes.
- To explore the correlation between optical imaging data and spectrometric measurements.
- To highlight the utility of these combined methods for analytical purposes.
Main Methods:
- Application of Schlieren and shadowgraph imaging techniques.
- Analysis of premixed flames.
- Correlation of optical data with atomic-absorption and flame-emission spectrometry signals.
Main Results:
- Schlieren and shadowgraph techniques provide detailed information about flame structures and dynamics.
- The data obtained from shadowgraphs can be effectively correlated with measured signals and signal noise in atomic-absorption and flame-emission spectrometry.
- This correlation enhances the analytical capabilities of flame spectrometry.
Conclusions:
- Schlieren and shadowgraph techniques are powerful tools for investigating premixed flames.
- Combining optical imaging with flame spectrometry offers a synergistic approach for detailed flame analysis.
- These integrated methods improve the understanding and quantification of flame processes.
More Related Videos
Related Concept Videos
01:02Flame Photometry: Overview
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...
01:16Flame Photometry: Lab
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...
01:29Atomic 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...
01:25Atomic Absorption Spectroscopy: Atomization Methods
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 aerosol...