一个封闭的光学路径痕迹H2S传感系统基于真空紫外线差分吸收光谱学与重建的域点云细分结合
1Measurement Technology & Instrumentation Key Laboratory of Hebei Province, Institute of Electrical Engineering, Yanshan University, Qinhuangdao 066004, China.
ACS sensors
|July 21, 2025
概括
一个新的闭合光学路径系统使用真空紫外线吸收光谱学准确检测微量硫化 (H2S). 这种方法克服了氧气干扰,实现了工业应用的低检测极限.
科学领域:
- 分析化学 分析化学
- 频谱学是一种光谱学.
- 环境监测 环境监测
背景情况:
- 精确检测微量硫化 (H2S) 对于工业减排和电力故障排除至关重要.
- 紫外差光吸收光谱法 (UV-DOAS) 是一个有前途的技术,但来自氧气 (O2) 和H2S不规则吸收的光谱重叠使真空紫外波段的测量复杂化.
研究的目的:
- 使用真空紫外线吸收光谱学开发一个封闭的光路 H2S 传感系统.
- 为了克服来自O2的光谱干扰,并准确测量H2S的低度.
主要方法:
- 实现了一个封闭的光路结构,以消除O2干扰.
- 采用了一种光谱线分析方法,结合了正弦光谱重建 (SSR) 和点云细分.
- 有组织的不规则的H2S吸收特征,用于增强低度测量.
主要成果:
- 该系统准确地在真空紫外波段的低度下动态测量H2S.
- 获得了1.61%的平均相对误差 (MRE).
- 达到H2S的41.2ppb的检测极限,检测时间为100秒.
结论:
- 拟议的封闭光路系统有效地解决了H2S测量中的O2光谱干扰.
- 这种方法在UV-DOAS应用中在H2S检测灵敏度和精度方面取得了显著的进步.
- 代表了一类最好的H2S测量水平,用于直接UV-DOAS技术应用.
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