分析化学2026，Vol.54Issue(1)：92-99,8.DOI:10.19756/j.issn.0253-3820.251007
偏振拉曼光谱测量大气中的痕量氢气
Measurement of Trace Hydrogen in Atmosphere Using Polarized Raman Spectroscopy
摘要
Abstract
As a clean energy source,the demand for hydrogen gas(H2)in industrial and commercial sectors is growing.To effectively monitor H2 leaks during production,storage,transportation and use,it is necessary to perform real-time detection of trace amounts of H2 in atmospheric conditions.However,the optical detection of trace hydrogen faces significant challenges due to the extremely weak electric quadrupole transitions of hydrogen molecules,making absorption spectroscopy measurements difficult.Raman spectroscopy has great potential for measuring trace gases,but its application is limited by sensitivity.In this work,a cavity-enhanced Raman spectroscopy technique incorporating Pound-Drever-Hall(PDH)frequency locking was presented.By measuring polarized Raman spectra,cavity enhancement significantly amplified the gas scattering signal intensity,and it leveraged the discriminability in polarization characteristics among Raman peaks of different vibrational modes to simplify complex Raman spectra and eliminate interference from water vapor during hydrogen gas measurement.This method achieved a low detection limit of 0.06 μmol/mol(at 1 atm)for hydrogen,enabling direct sampling and continuous measurement of hydrogen in ambient air with a relative measurement precision of 5%,which demonstrated its capability for quantitative measurement of trace H2 in complex gas environments.关键词
光谱学/痕量气体检测/偏振拉曼光谱/腔增强拉曼光谱/氢气Key words
Spectroscopy/Trace gas detection/Polarized Raman spectroscopy/Cavity-enhanced Raman spectroscopy/Hydrogen引用本文复制引用
宋逸凡,仰青颖,陈胜坦,王进,谈艳,孙羽,胡水明..偏振拉曼光谱测量大气中的痕量氢气[J].分析化学,2026,54(1):92-99,8.基金项目
科技创新2030"量子通信与量子计算机"重大项目(Nos.2021ZD0303102,2023ZD0301000)和国家自然科学基金项目(Nos.22241302,12393825)资助. Supported by the Innovation Program for Quantum Science and Technology(Nos.2021ZD0303102,2023ZD0301000)and the National Natural Science Foundation of China(Nos.22241302,12393825). （Nos.2021ZD0303102,2023ZD0301000）
