Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

296
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....
296
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

592
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.
592
NMR Spectrometers: Overview01:20

NMR Spectrometers: Overview

1.3K
NMR spectrometers consist of a strong magnet, a radiofrequency transmitter, and a detector attached to a computer console for recording spectra of samples containing NMR-active nuclei. In first-generation NMR instruments called continuous-wave spectrometers, the resonance frequencies of the nuclei are determined by frequency-sweep or field-sweep methods. The magnetic field strength is fixed and the rf signal is swept in the former, while the radiofrequency signal is fixed and the magnetic field...
1.3K
Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

530
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
530
Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

243
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...
243
Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

957
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...
957

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Persistent compensated ferrimagnetism in the molecular framework Cr(pyrazine)<sub>3</sub>.

Nature chemistry·2026
Same author

One-Dimensional Polycyclic Aromatic Hydrocarbons Incorporating Multiple Dithiafulvene Units-Novel Multi-Redox and Electrochromic Systems.

Angewandte Chemie (International ed. in English)·2026
Same author

Electron spin relaxation of SO<sub>2</sub> <sup>-</sup> and SO<sub>3</sub> <sup>-</sup> radicals in solid Na<sub>2</sub>S<sub>2</sub>O<sub>4</sub>, Na<sub>2</sub>S<sub>2</sub>O<sub>5</sub>, and K<sub>2</sub>S<sub>2</sub>O<sub>5</sub>.

Applied magnetic resonance·2025
Same author

Anisotropy of Spin-Lattice Relaxation Time (<i>T</i><sub>1</sub>) for Oxo-Vanadium(IV) and Nitrido Chromium(V) Porphyrins.

Journal of the American Chemical Society·2025
Same author

EPR Spectra and Electron Spin Relaxation of O<sub>2</sub>.

Applied magnetic resonance·2025
Same author

The role of electronic excited states in the spin-lattice relaxation of spin-1/2 molecules.

Science advances·2025

相关实验视频

Updated: Sep 10, 2025

Rapid Scan Electron Paramagnetic Resonance Opens New Avenues for Imaging Physiologically Important Parameters In Vivo
08:01

Rapid Scan Electron Paramagnetic Resonance Opens New Avenues for Imaging Physiologically Important Parameters In Vivo

Published on: September 26, 2016

9.5K

紧型1GHz电子磁共振光谱仪和成像仪

Tanden A Hovey1, Lukas B Woodcock1, Georgina Amassah1

  • 1Department of Chemistry and Biochemistry, University of Denver, Denver, Colorado 80210, USA.

The Review of scientific instruments
|August 19, 2025
PubMed
概括

一个新的1GHz临床前电子磁共振光谱仪使得低激素度的敏感检测成为可能. 这种先进的EPR系统显示了改善的信号噪声比,用于研究氧化基,并使3D空间成像成为可能.

更多相关视频

Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy
10:03

Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy

Published on: June 27, 2014

18.0K
In Situ Detection and Single Cell Quantification of Metal Oxide Nanoparticles Using Nuclear Microprobe Analysis
14:53

In Situ Detection and Single Cell Quantification of Metal Oxide Nanoparticles Using Nuclear Microprobe Analysis

Published on: February 3, 2018

7.2K

相关实验视频

Last Updated: Sep 10, 2025

Rapid Scan Electron Paramagnetic Resonance Opens New Avenues for Imaging Physiologically Important Parameters In Vivo
08:01

Rapid Scan Electron Paramagnetic Resonance Opens New Avenues for Imaging Physiologically Important Parameters In Vivo

Published on: September 26, 2016

9.5K
Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy
10:03

Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy

Published on: June 27, 2014

18.0K
In Situ Detection and Single Cell Quantification of Metal Oxide Nanoparticles Using Nuclear Microprobe Analysis
14:53

In Situ Detection and Single Cell Quantification of Metal Oxide Nanoparticles Using Nuclear Microprobe Analysis

Published on: February 3, 2018

7.2K

科学领域:

  • 生物物理学的生物物理.
  • 频谱学是一种光谱学.
  • 医疗成像医学成像

背景情况:

  • 电子磁共振 (EPR) 光谱对于研究激进物种至关重要.
  • 临床前EPR成像需要高灵敏度来检测低度的激素.
  • 之前的EPR系统在信号噪声比 (SNR) 和灵敏度方面遇到了局限性.

研究的目的:

  • 开发一个高频 (1 GHz) 临床前EPR光谱仪和成像仪.
  • 为了提高对低度激素的检测灵敏度.
  • 为了证明系统对激进解决方案的3D空间成像的能力.

主要方法:

  • 设计了一个1GHz的EPR光谱仪和成像仪,专注于最大限度地减少信号损失.
  • 使用快速扫描检测和低噪音放大器.
  • 采用可调频源,低噪声和放大输出.
  • 在圆柱形共振器 (8毫米和25毫米) 中对氧化基的测试系统性能.

主要成果:

  • 与700 MHz仪器相比,实现了更好的信号噪声比率,与频率依赖预测一致.
  • 已证明的检测极限为2 × 10^14旋转 (8毫米共振器) 和4.5 × 10^15旋转 (25毫米共振器) 的15N-d16 tempone.
  • 通过使用带有氧化物激素溶液的幻影成功执行了3D空间成像.

结论:

  • 开发的1GHz EPR光谱仪和成像仪显著提高了激素检测的灵敏度.
  • 系统的设计有效地将损失降到最低,从而改善SNR.
  • 这项技术对先进的临床前EPR研究和3D成像应用具有前景.