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相关概念视频

UV–Vis Spectrometers01:14

UV–Vis Spectrometers

1.5K
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.
1.5K
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

568
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.
568
Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

1.2K
Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and signal-to-noise ratio for the analyte. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.
Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called collision-induced...
1.2K
IR Spectrometers01:25

IR Spectrometers

1.3K
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...
1.3K
Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview01:02

Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview

2.9K
Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material,  molecules absorb light depending on the energy required for...
2.9K
Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

854
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...
854

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相关实验视频

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Biomolecular Imaging of Cellular Uptake of Nanoparticles using Multimodal Nonlinear Optical Microscopy
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一个超微型光谱仪

Jorge Quereda1, Andres Castellanos-Gomez2

  • 1Grupo Interdisciplinar de Sistemas Complejos: Modelización Y Simulación, Departamento de Física de Materiales, Universidad Complutense de Madrid, Madrid, Spain.

Science (New York, N.Y.)
|October 20, 2022
PubMed
概括

微型光谱仪在日常消费电子产品中提供了先进的传感功能. 这种技术进步扩大了光谱学的潜在应用范围,超出了传统的实验室环境.

科学领域:

  • 光学和光学
  • 光谱学
  • 微型化技术

背景情况:

  • 光谱仪是测量光特性的关键分析仪器.
  • 目前的光谱仪通常很庞大,限制了它们在便携式设备中的广泛应用.
  • 光学工程的进步推动了更小,更高效的光谱仪的开发.

研究的目的:

  • 探索消费者应用的光谱仪缩小的可行性.
  • 确定光谱仪小型化的关键挑战和潜在解决方案.
  • 评估微型光谱仪对消费电子市场的影响.

主要方法:

  • 对现有的光学元件小型化技术进行审查.
  • 对小型光谱仪的新材料和制造工艺的分析.
  • 缩小尺寸光谱仪设计的模拟和建模.

主要成果:

  • 成功展示了显著缩小尺寸的光谱仪设计.
  • 确定微型光谱仪的成本效益制造方法.
  • 与较大的传统光谱仪相比,性能指标的验证.

结论:

  • 可以实现光谱仪的小型化,为消费者设备的整合铺平了道路.

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Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy
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Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy
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  • 微型光谱仪为移动化学分析和材料识别提供了新的可能性.
  • 这项创新将通过结合先进的光谱能力来彻底改变消费电子产品.