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Related Concept Videos

Flame Photometry: Overview01:02

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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...
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Atomic Emission Spectroscopy: Interference01:30

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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,...
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Atomic Absorption Spectroscopy: Atomization Methods01:25

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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...
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Combustion Energy: A Measure of Stability in Alkanes and Cycloalkanes02:14

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The low reactivity in alkanes can be attributed to the non-polar nature of C–C and C–H σ bonds. Alkanes, therefore, were  initially termed as “paraffins,” derived from the Latin words: parum, meaning “too little,” and affinis, meaning “affinity.”
Alkanes undergo combustion in the presence of excess oxygen and high-temperature conditions to give carbon dioxide and water. A combustion reaction is the energy source in natural gas, liquified...
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Flame Photometry: Lab01:16

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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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Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

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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.
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Sounding Solid Combustibles: Non-Premixed Flame Sound Synthesis for Different Solid Combustibles.

Qiang Yin, Shiguang Liu

    IEEE Transactions on Visualization and Computer Graphics
    |December 28, 2016
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    Summary
    This summary is machine-generated.

    This study introduces a new fire sound synthesis framework, SSC, that accurately models different solid combustibles. By analyzing popping sounds, it enhances realism for applications in virtual reality and gaming.

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    Area of Science:

    • Acoustics
    • Computer Graphics
    • Material Science

    Background:

    • The virtual reality (VR) industry's growth necessitates realistic auditory experiences.
    • Existing fire sound synthesis methods often fail to account for material properties, reducing realism.

    Purpose of the Study:

    • To develop a novel framework for synthesizing fire sounds that accurately reflects different solid combustibles.
    • To improve the fidelity and distinguishability of synthesized fire sounds.

    Main Methods:

    • Proposed the Sounding Solid Combustibles (SSC) framework, a recording-driven approach for non-premixed flame sound synthesis.
    • Incorporated three sound components: combustion noise, vortex noise, and popping sounds.
    • Utilized a modified Empirical Mode Decomposition (EMD) method to extract popping sound features from real fire recordings.

    Main Results:

    • The SSC framework successfully synthesizes distinct fire sounds for various solid combustibles.
    • Accurate modeling of popping sounds proved crucial for differentiating material-specific fire acoustics.
    • Resolved synchronization issues when blending synthesized sound components.

    Conclusions:

    • The SSC framework offers a significant advancement in realistic fire sound synthesis.
    • The method's ability to distinguish between different solid combustibles has high potential for VR and gaming applications.