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Related Concept Videos

Flame Photometry: Overview01:02

Flame 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...
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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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Super-resolution Fluorescence Microscopy

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Atomic Emission Spectroscopy: Interference01:30

Atomic Emission Spectroscopy: Interference

In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
Atomic Fluorescence Spectroscopy01:29

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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...
Raman Spectroscopy: Overview01:20

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The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
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Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
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Spatially resolved optical Stark-modulation spectroscopy in flames.

J E Goldsmith, R L Farrow

    Optics Letters
    |August 28, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Spatially resolved optical Stark-modulation spectroscopy enables point-absorption measurements in combustion. This technique was demonstrated by studying atomic sodium within a flame environment.

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    Flame Experiments at the Advanced Light Source: New Insights into Soot Formation Processes
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    Flame Experiments at the Advanced Light Source: New Insights into Soot Formation Processes

    Published on: May 26, 2014

    Area of Science:

    • Spectroscopy
    • Combustion diagnostics
    • Atomic physics

    Background:

    • Accurate measurements of species concentrations are crucial for understanding combustion processes.
    • Optical spectroscopy offers non-intrusive methods for in-situ analysis.
    • Existing techniques may have limitations in spatial resolution or applicability.

    Purpose of the Study:

    • To present a novel application of spatially resolved optical Stark-modulation spectroscopy.
    • To demonstrate its utility for point-absorption measurements in combustion.
    • To investigate atomic sodium behavior in a flame using this technique.

    Main Methods:

    • Utilized spatially resolved optical Stark-modulation spectroscopy.
    • Applied the technique to monitor electronic energy level transitions.
    • Performed measurements in a combustion environment with aspirated atomic sodium.

    Main Results:

    • Successfully applied optical Stark-modulation spectroscopy for point-absorption measurements.
    • Demonstrated the technique's capability in a flame.
    • Obtained data on atomic sodium transitions within the combustion zone.

    Conclusions:

    • Spatially resolved optical Stark-modulation spectroscopy is a viable method for combustion analysis.
    • The technique provides precise point-absorption measurements.
    • Further applications in combustion diagnostics are promising.