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Updated: Jul 4, 2025

Fast and Accurate Exhaled Breath Ammonia Measurement
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基于QEPAS和H-QEPAS技术的高灵敏度甲检测与自行设计的8.7kHz石英调音叉相结合

Tiantian Liang1,2, Shunda Qiao1,2, Yanjun Chen1,2

  • 1National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China.

Photoacoustics
|February 7, 2024
PubMed
概括

一个新的石英调音叉 (QTF) 设计通过光声谱学提高了甲 (CH4) 检测灵敏度. 这项创新提高了信号强度,并降低了用于准确监测温室气体的检测极限.

关键词:
检测CH4的检测方法异质石英增强的光声谱学.用石英增强的光声谱学.自行设计的石英调音叉.

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In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
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Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
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