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Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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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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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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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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In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this...
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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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Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
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相关实验视频

Updated: Jul 2, 2025

Conducting Multiple Imaging Modes with One Fluorescence Microscope
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具有可切换多色配置的二维连贯电子光谱仪.

Oskar Kefer1, Pavel V Kolesnichenko1, Tiago Buckup1

  • 1Physikalisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, D-69120 Heidelberg, Germany.

The Review of scientific instruments
|February 28, 2024
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种用于二维电子光谱 (2DES) 的简单多色系统,以克服带宽限制. 这种可适应的方法提高了复杂样品的光谱选择性,为激发状态动态提供了更深入的见解.

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科学领域:

  • 物理化学 物理化学
  • 频谱学是一种光谱学.
  • 激光科学 激光科学

背景情况:

  • 宽带二维电子光谱 (2DES) 对许多研究领域至关重要,但面临着重大实施挑战.
  • 现有的双色球策略有效地扩大了光谱带宽,但需要复杂的设置.
  • 克服2DES中的带宽限制对于详细的分子动力学研究至关重要.

研究的目的:

  • 通过使用可调节的镜子支架,为2DES提供简单,可适应的多色配置.
  • 为了在一个设备内实现单色,双色和短暂的2DES之间无切换.
  • 证明该方法在增强光谱选择性和提供对激发状态过程的洞察力方面的有效性.

主要方法:

  • 实现基于可调节的镜子支架的多色配置,用于2DES.
  • 在单色,双色和短暂的2DES模式之间无切换.
  • 使用Rhodamine 6G和尼罗河蓝激光染料对系统进行基准测试,包括混合样本.

主要成果:

  • 多色2DES系统允许在不同的光谱配置之间轻松切换.
  • 单色2DES显示混合染料的重叠信号,而双色和短暂的2DES实现了对尼罗河蓝的高选择性.
  • 多色模式中的光谱转移,完全共振激发使特定染料反应的选择性探测成为可能.

结论:

  • 提出的方法提供了一种简单而有效的解决方案,以克服2DES.中的带宽限制.
  • 这种可适应的方法可以很容易地集成到其他光谱设置中.
  • 包含暂时的2DES为研究激发状态连贯性和动态提供了更高的灵敏度.