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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

666
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....
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UV–Vis Spectrometers01:14

UV–Vis Spectrometers

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The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.
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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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Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

2.3K
Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...
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IR Spectrometers01:25

IR Spectrometers

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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
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Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

1.6K
An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
The atomizer used in AAS can be either a flame atomizer or an...
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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
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流式自纠正双光谱仪.

Alexander Eber, Christoph Gruber, Martin Schultze

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    此摘要是机器生成的。

    我们开发了一个实时自我校正系统,用于双光谱,简化测量,并使长期连贯的平均值. 这一进步使得先进的光谱学可用于更广泛的应用.

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    科学领域:

    • 频谱学是一种光谱学.
    • 光学物理学的光学物理学
    • 计量学 计量学 计量学

    背景情况:

    • 双光谱 (DCS) 提供高分辨率,但需要复杂的自我校正.
    • 现有的方法通常需要连续的干扰图数据,并与不稳定的信号作斗争.

    研究的目的:

    • 为了彻底简化连贯平均双光谱学.
    • 引入实时自我校正系统,以提高可访问性和性能.
    • 为了实现日常应用的瞬间双光谱学.

    主要方法:

    • 实现了芯片上的无线电频率系统,用于实时计算干扰图相位,频率和到达时间.
    • 开发了一种算法来计算和纠正载体外偏移频率和重复率差异.
    • 引入了跨通道校正来处理不稳定或间歇信号.

    主要成果:

    • 实现了子分辨率光谱学,具有富里埃有限的线宽和高的信号噪声比.
    • 在任意长时间内展示了连贯的平均值.
    • 获得了与和乙光谱学在10 THz带宽上的文献的良好一致.

    结论:

    • 实时自我校正系统显著简化了双光谱学.
    • 跨通道校正克服了以前方法的局限性,使其能够应用于不稳定或低振幅信号.
    • 这种方法使即时双光谱成为广泛使用的实用方法.