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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

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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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Atomic Absorption Spectroscopy: Radiation and Light Sources01:13

Atomic Absorption Spectroscopy: Radiation and Light Sources

430
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...
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Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

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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...
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Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

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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...
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Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

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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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Updated: Jul 16, 2025

Direct Comparison of Hyperspectral Stimulated Raman Scattering and Coherent Anti-Stokes Raman Scattering Microscopy for Chemical Imaging
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高灵敏度电子斯塔克光谱仪采用激光驱动的光源.

J S Huff1, K M Duncan1, C J van Galen2

  • 1Micron School of Materials Science and Engineering, Boise State University, Boise, Idaho 83725, USA.

The Review of scientific instruments
|September 20, 2023
PubMed
概括
此摘要是机器生成的。

这项研究详细介绍了一种具有稳定的激光驱动光源的高灵敏度斯特克吸收光谱仪. 它为精确的光谱测量提供了比电弧驱动源更好的性能.

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科学领域:

  • 频谱学是一种光谱学.
  • 激光技术 激光技术 激光技术
  • 物理化学 物理化学

背景情况:

  • 高灵敏度光谱对于详细的分子分析至关重要.
  • 传统的光源往往遭受不稳定和噪声,限制测量精度.
  • 开发先进的光谱仪器对于科学进步至关重要.

研究的目的:

  • 报告一款新型高灵敏度斯塔克吸收光谱仪的开发和性能.
  • 用于光谱应用的新型激光驱动光源的特征.
  • 为了证明光谱仪在实现低噪声水平方面的能力.

主要方法:

  • 使用激光驱动的光源,低强度波动和最小漂移.
  • 实现平衡检测与多重采样以减少噪音.
  • 在恒定波长或波数光谱带通模式下运行光谱仪.

主要成果:

  • 激光驱动的光源显示强度波动~0.3%,漂移≤0.1%/h.
  • 单个A和ΔA光谱的噪声幅度为7×10-4和6×10-6,分别为7×10-4和6×10-6.
  • 性能指标与弧形驱动光源相当或优于弧形驱动光源.

结论:

  • 开发的Stark吸收光谱仪提供了高灵敏度和稳定性.
  • 激光驱动的光源是一种可行的,高性能的替代电弧驱动的光源.
  • 仪器的进步使得能够进行更精确的光谱测量.