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相关概念视频

UV–Vis Spectrometers01:14

UV–Vis Spectrometers

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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.
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相关实验视频

Updated: May 29, 2025

High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings
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一种光诱导的热弹性光谱学,使用表面安装设备石英调音叉.

Shaoqiang Bi1, Xinru Zhang1, Zhonghai Zhang1

  • 1School of Physics Science and Information Technology and Shandong Key Laboratory of Optical Communication Science and Technology, Liaocheng University, Liaocheng 252000, China.

Photoacoustics
|February 6, 2025
PubMed
概括

本研究介绍了一种表面安装设备石英调叉 (SMD QTF),用于检测微量乙 (C2H2) 气体. 与传统方法相比,新系统提供了显著提高的灵敏度和稳定性.

关键词:
吸收气体的电池可以吸收气体.气体传感器可以检测到气体.光诱导的热弹性光谱学石英调音叉的使用方法

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科学领域:

  • 分析化学 分析化学
  • 频谱学是一种光谱学.
  • 材料科学 材料科学 材料科学

背景情况:

  • 微量气体检测对于环境监测和工业安全至关重要.
  • 在光诱导热弹性光谱学 (LITES) 中,常规的石英调音叉 (QTF) 可能会受到氧化和频率漂移的影响.
  • 现有的方法可能需要去除外,这增加了检测过程的复杂性.

研究的目的:

  • 开发和评估一种用于微量乙 (C2H2) 气体检测的新系统.
  • 为了比较表面安装设备石英调音叉 (SMD QTF) 与使用LITES的常规插入式石英调音叉 (P-QTF) 的性能.
  • 在成本,稳定性和灵敏性方面评估SMD QTF的优势.

主要方法:

  • 利用光诱导热弹性光谱学 (LITES) 来检测气体.
  • 使用表面安装设备石英调音叉 (SMD QTF) 采用透明玻璃外.
  • 将SMD QTF的性能与传统的插入式石英调音叉 (P-QTF) 相比较.
  • 测量信号幅度和最小检测极限 (MDL).

主要成果:

  • 与传统的P-QTF相比,SMD QTF的Q因子高出2至4倍.
  • 使用SMD-QTF的信号振幅大约是P-QTF的9倍.
  • 实现了较低的最低检测极限:SMD QTF 的 40.39 ppb@200s,而 P-QTF 的 68.11 ppb@220s.

结论:

  • SMD QTF 是一种具有成本效益和强大的替代品,用于微量乙检测.
  • SMD QTFs减轻氧化和共振频率漂移,增强系统稳定性.
  • 拟议的系统为基于LITES的气体传感提供了卓越的灵敏度和性能.