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関連する概念動画

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...
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: 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.
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 Spectroscopy: Absorption, Emission, and Fluorescence01:23

Atomic Spectroscopy: Absorption, Emission, and Fluorescence

Atomic spectroscopy is a vital tool in elemental analysis, both qualitatively and quantitatively. It can be broadly divided into optical spectroscopy, mass spectroscopy, and X-ray spectroscopy methods. The optical spectroscopic methods are atomic absorption spectroscopy (AAS), atomic emission spectroscopy (AES), and atomic fluorescence spectroscopy (AFS). The first step in all three methods is atomization, where the solid, liquid, or solution-phase samples are converted into gas-phase atoms and...
Atomic Absorption Spectroscopy: Atomization Methods01:25

Atomic 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...

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関連する実験動画

Updated: Jul 11, 2026

Multimodal Nonlinear Hyperspectral Chemical Imaging Using Line-Scanning Vibrational Sum-Frequency Generation Microscopy
08:49

Multimodal Nonlinear Hyperspectral Chemical Imaging Using Line-Scanning Vibrational Sum-Frequency Generation Microscopy

Published on: December 1, 2023

スパーク放電:多元素スペクトロ化学分析の応用

J P Walters

    Science (New York, N.Y.)
    |November 25, 1977
    PubMed
    まとめ

    スパーク放電は,各スパークが次のスパークに影響を与える周期的なエネルギー分散プロセスです. 顕微鏡分析により,より優れたスペクトロ化学分析のために,その地形を形作る明確な化学メカニズムを持つ有序な光放出が明らかになる.

    科学分野:

    • アナリティカル・ケミストリー (Analytical Chemistry) とは
    • 物理化学 物理化学
    • 原子・分子物理学 原子・分子物理学

    背景:

    • スパーク放電は,エネルギーの消耗を含む複雑な現象です.
    • スパーク放電の空間的および時間的特性を理解することは,分析アプリケーションにとって極めて重要です.
    • 以前の研究は,火花放電内の詳細な構造と化学的プロセスを完全に解明できませんでした.

    研究 の 目的:

    • エネルギー消耗プロセスとしての火花放電の周期的性質を調査する.
    • スパーク放電における光放射の空間的およびスペクトル的な分布を特徴づける.
    • 観測されたスペクトロスコーピカルトポグラフィに起因する化学的メカニズムを特定し,スペクトロケミカル分析におけるその応用を探求する.

    主な方法:

    • 高い時間,空間,スペクトルの解像度を持つスペクトル顕微鏡器具を使用しました.
    • 排出後の環境を視覚化するために,Schlierenのデータを使用しました.
    • イオン化された種の空間的偶然と,その発光チャネルに相対する放射特性を分析した.

    主要な成果:

    • スパーク放電は,前回の火花の影響を受けた周期的なプロセスを表します.

    さらに関連する動画

    Using Cyclic Voltammetry, UV-Vis-NIR, and EPR Spectroelectrochemistry to Analyze Organic Compounds
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    Using Cyclic Voltammetry, UV-Vis-NIR, and EPR Spectroelectrochemistry to Analyze Organic Compounds

    Published on: October 18, 2018

    Method for Recording Broadband High Resolution Emission Spectra of Laboratory Lightning Arcs
    07:51

    Method for Recording Broadband High Resolution Emission Spectra of Laboratory Lightning Arcs

    Published on: August 27, 2019

    関連する実験動画

    Last Updated: Jul 11, 2026

    Multimodal Nonlinear Hyperspectral Chemical Imaging Using Line-Scanning Vibrational Sum-Frequency Generation Microscopy
    08:49

    Multimodal Nonlinear Hyperspectral Chemical Imaging Using Line-Scanning Vibrational Sum-Frequency Generation Microscopy

    Published on: December 1, 2023

    Using Cyclic Voltammetry, UV-Vis-NIR, and EPR Spectroelectrochemistry to Analyze Organic Compounds
    11:44

    Using Cyclic Voltammetry, UV-Vis-NIR, and EPR Spectroelectrochemistry to Analyze Organic Compounds

    Published on: October 18, 2018

    Method for Recording Broadband High Resolution Emission Spectra of Laboratory Lightning Arcs
    07:51

    Method for Recording Broadband High Resolution Emission Spectra of Laboratory Lightning Arcs

    Published on: August 27, 2019

  • 発光は火花チャネルの周りに円筒状の対称性を示し,イオン化された種の分布は刺激レベルと相関しています.
  • マグネシウムイオンの全線逆転が観察され,光吸収が顕著であることが示されています.
  • 放電後の環境におけるトロイド状の構造を特定し,主要な化学的メカニズムとして,電荷移転,ペニングイオン化,感受性光を提案した.
  • 結論:

    • スパーク放電のスペクトル学的な地形は高度に秩序があり,特定の化学プロセスによって支配されます.
    • この地形は,より敏感でシンプルなスペクトロ化学分析方法を開発するために活用することができます.
    • この発見は,火花放電の物理と化学をより深く理解し,分析技術に対する実用的な意味合いを提供します.