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相关概念视频

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

296
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....
296
Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

244
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...
244
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

594
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.
594
Atomic Absorption Spectroscopy: Radiation and Light Sources01:13

Atomic Absorption Spectroscopy: Radiation and Light Sources

544
Atomic absorption spectroscopy (AAS) relies on the Beer-Lambert law, which requires that the radiation source emits a narrow range of wavelengths to match the absorption characteristics of the analyte atom. The primary criteria for choosing an appropriate radiation source in AAS is to provide a precise and intense emission at specific wavelengths that will allow accurate detection of the analyte.
Two common narrow-range 'line' sources used in AAS are hollow-cathode lamps (HCLs) and...
544
Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle01:19

Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle

866
Inductively coupled plasma (ICP) is the most widely used plasma source in atomic emission spectroscopy (AES), also known as Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The ICP source, or torch, consists of three concentric quartz tubes with argon gas flowing through them. A spark from a Tesla coil initiates the ionization of argon, generating a high-temperature plasma.
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
866
Gas Chromatography: Types of Detectors-II01:19

Gas Chromatography: Types of Detectors-II

499
In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
499

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相关实验视频

Updated: Sep 11, 2025

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
12:57

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

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使用不连贯的光源的紧型空气溶探测器.

Jacob Williamson, Pranav Chamakkad Muthukrishnan, Srushti Nandanwar

    Applied optics
    |August 12, 2025
    PubMed
    概括

    我们开发了一个紧的光学粒子计数器,使用了法布里-佩罗洞和非连贯光. 这种创新的设计增强了光散射检测,为超细颗粒测量提供了便携式解决方案.

    科学领域:

    • 光学物理学 光学物理学
    • 粒子科学 粒子科学
    • 仪器化 仪器化 仪器化

    背景情况:

    • 传统的基于激光的光学粒子计数器对振动和背景噪声敏感.
    • 现有的仪器往往是重的,限制了便携性和现场应用.
    • 对标准计数器来说,检测超细粒子 (<300nm) 仍然是一个挑战.

    研究的目的:

    • 开发一个紧和便携式的光学粒子计数器.
    • 为了克服基于激光的空腔方法的振动灵敏度.
    • 为了提高检测小颗粒的性能,包括超细颗粒.

    主要方法:

    • 使用高精度的法布里-佩罗特光学腔来增强光散射.
    • 使用非连贯光源 (超发光和发光二极管),以消除对振动的敏感性.
    • 实施了一种传输检测模式,用于小型化,可减少腔镜分离 (<1厘米).

    主要成果:

    • 实现了紧的仪器设计,没有明显的缩小限制.
    • 证明消除了以激光为基础的空腔方法中典型的振动灵敏度.
    • 初步比较表明对超细颗粒 (<300 nm) 的敏感性,商业计数器经常错过.

    更多相关视频

    Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
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    Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

    Published on: March 22, 2019

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    Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers
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    Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers

    Published on: August 18, 2017

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    相关实验视频

    Last Updated: Sep 11, 2025

    Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
    12:57

    Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

    Published on: October 13, 2017

    9.3K
    Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
    10:42

    Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

    Published on: March 22, 2019

    6.3K
    Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers
    08:51

    Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers

    Published on: August 18, 2017

    10.4K

    结论:

    • 开发的Fabry-Perot腔光学粒子计数器提供了一个新的,紧的,便携式的解决方案.
    • 使用非连贯光源可以显著降低仪器对振动的灵敏度.
    • 这项技术代表了新一代的仪器,有可能检测超细颗粒.