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相关概念视频

Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle01:19

Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle

577
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...
577
Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview01:19

Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview

703
In inductively coupled plasma–mass spectrometry (ICP–MS), an inductively coupled plasma (ICP) torch is used as an atomizer and ionizer. Solid samples are dissolved and volatilized before being introduced into the high-temperature argon plasma, while solution samples are nebulized and passed through the high-temperature argon plasma. Plasma dissociates the analytes and ionizes their component atoms to form a mixture of positive ions and molecular species. The positive ions are then...
703
Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

2.1K
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...
2.1K
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

363
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.
363
Atomic Emission Spectroscopy: Interference01:30

Atomic Emission Spectroscopy: Interference

179
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,...
179
Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

156
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...
156

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相关实验视频

Updated: Jun 23, 2025

Treating Surfaces with a Cold Atmospheric Pressure Plasma using the COST-Jet
06:36

Treating Surfaces with a Cold Atmospheric Pressure Plasma using the COST-Jet

Published on: November 2, 2020

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通过冷等离子体进行脉冲处理,应用于工业排放控制.

E J M Van Heesch1, T Huiskamp1, K Yan1,2

  • 1Electrical Engineering Department, Eindhoven University of Technology, Eindhoven, Netherlands.

Frontiers in chemistry
|June 24, 2024
PubMed
概括

冷等离子技术有效地去除高达99%的空气中的挥发性有机化合物 (VOC) 和气味. 这种高效的污染控制方法利用近大气压反应堆中的脉冲电气放电.

关键词:
兰伯特函数是兰伯特函数的一个函数.这是一种VOC,可挥发性化合物.冰冷的等离子体是什么?排放控制系统的排放控制系统纳米秒脉冲中的脉冲.血处理等离子体处理.脉冲处理是一种脉冲处理.

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Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry
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相关实验视频

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Treating Surfaces with a Cold Atmospheric Pressure Plasma using the COST-Jet
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Published on: November 2, 2020

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Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry
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An Atmospheric Pressure Plasma Setup to Investigate the Reactive Species Formation
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科学领域:

  • 环境工程 环境工程
  • 等离子体化学
  • 化学工程是化学工程的重要组成部分.

背景情况:

  • 冷等离子是用于化学加工和污染控制的新兴技术.
  • 在接近大气压的脉冲电气放电提供了一个独特的反应环境.
  • 工业应用需要强大的系统来处理空气中的污染物,如VOC和气味.

研究的目的:

  • 开发和测试强大的冷等离子体系统,用于工业污染控制.
  • 研究冷等离子体在去除挥发性有机化合物 (VOC) 和气味方面的效率.
  • 开发脉冲等离子体化学的动力模型,以解释实验数据.

主要方法:

  • 发展脉冲冷等离子反应堆系统,在接近大气压下运行.
  • 工业规模的测试用于控制空气中的挥发性有机物和气味.
  • 收集和分析电气,化学和气味测量数据.
  • 为脉冲等离子体化学开发一个近似的全球反应动力学模型.

主要成果:

  • 冷等离子系统证明了有效地去除空气中的污染物,在某些情况下达到高达99%的降低.
  • 一个简化的动力模型显示,污染物去除主要取决于电等离子体功率,气体流量和输入度.
  • 在可接受的能源需求下实现了污染控制.

结论:

  • 冷等离子驱动化学加工是工业空气污染控制的一个有前途的技术.
  • 开发的动力模型为理解和优化等离子体处理过程提供了有用的工具.
  • 未来的改进包括利用 (亚纳秒) 脉冲等离子体,固态高压技术和催化剂集成以提高效率.