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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

254
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....
254
Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

198
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...
198
Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

2.3K
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...
2.3K
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

525
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.
525
Atomic Emission Spectroscopy: Interference01:30

Atomic Emission Spectroscopy: Interference

229
In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
229
Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle01:19

Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle

700
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...
700

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Analysis of SEC-SAXS data via EFA deconvolution and Scatter
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使用人工智能进行Kβ X射线发射光谱分析的AXEAP2程序.

In Hui Hwang1, Shelly D Kelly1, Maria K Y Chan2

  • 1X-ray Science Division, Argonne National Laboratory, Lemont, IL 60439, USA.

Journal of synchrotron radiation
|August 1, 2023
PubMed
概括

分析同步射线X射线发射光谱 (XES) 是一个挑战. 在AXEAP2软件中实现的一种新的遗传算法方法,自动化了对3D过渡金属的光谱分析,提供了电子结构洞察力.

关键词:
这就是AXEAPAP.在 XESES XES 中.电子相互作用的电子相互作用.遗传算法是一种遗传算法.旋转状态 旋转状态

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科学领域:

  • 材料科学 材料科学 材料科学
  • 频谱学是一种光谱学.
  • 计算化学计算化学

背景情况:

  • 同步射线X射线发射光谱 (XES) 数据处理和分析需要专门的专业知识.
  • 之前的工作开发了用于XES数据处理的无监督机器学习,但分析仍然是一个挑战.
  • 分析3d过渡金属的非共振Kβ XES提供电子结构信息 (氧化和旋转状态),但参数匹配是劳动密集的.

研究的目的:

  • 开发一种用于分析X射线辐射光谱 (XES) 数据的自动化方法.
  • 应用基于遗传算法的方法来适应3D过渡金属的实验XES数据.
  • 为高效的XES数据分析创建一个用户友好的应用程序.

主要方法:

  • 开发了一种新的XES数据分析方法,利用遗传算法.
  • 在一个独立的应用程序中实现了基因算法方法,名为Argonne X-ray发射分析2 (AXEAP2).
  • 应用了AXEAP2应用程序来分析Mn,Co和Ni氧化物的XES数据.

主要成果:

  • AXEAP2应用程序成功地找到最佳参数,以获得高质量的实验XES光谱,并且用户干预最小.
  • 该方法准确地复制了Mn,Co和Ni氧化物的实验光谱.
  • 分析提供了对3d电子自旋状态,3d-3p交换相互作用和Kβ辐射核心孔寿命的见解.

结论:

  • 基于遗传算法的AXEAP2软件显著简化和加快了XES数据的分析.
  • 这种方法为3D过渡金属氧化物的电子结构提供了宝贵的见解.
  • 使用AXEAP2的自动光谱分析增强了XES在材料表征方面的实用性.