Highly sensitive trace oxygen sensing based on far-ultraviolet absorption spectroscopy

被引:5
|
作者
Ai, Xinyu [1 ]
Zhang, Yungang [3 ]
Zhang, Zhiguo [1 ,2 ]
机构
[1] Harbin Inst Technol, Sch Phys, Harbin 150001, Peoples R China
[2] Harbin Inst Technol, Sch Instrument Sci & Engn, Harbin 150001, Peoples R China
[3] Yanshan Univ, Sch Elect Engn, Qinhuangdao 066004, Hebei, Peoples R China
关键词
Absorption spectroscopy - Oxygen sensors - Ultraviolet spectroscopy;
D O I
10.1039/d2an00865c
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
High-sensitivity trace oxygen sensing based on far-ultraviolet absorption spectroscopy was realized. The far-ultraviolet absorption spectrum of oxygen in the wavelength range of 170-200 nm at normal pressure was measured, and the maximum oscillation absorption peak occurred close to 180.18 nm. Through error analysis, the optimal wavelength range for accurate and sensitive oxygen measurements by ultraviolet absorption spectroscopy was identified as 180-189 nm. A total column (CL) calibration curve for oxygen was established, and the maximum optical path length (L-1) of the system was determined to be 0.75(3) m by comparing the oxygen absorption with and without the sample cell. The oxygen detection sensitivity was 232 m(-1), and the lowest detection limit was 12 ppm at the L-1 optical path length. The highly sensitive trace oxygen sensing based on far-ultraviolet absorption spectroscopy exhibited significant potential for application with regard to nitrogen protection.
引用
收藏
页码:4365 / 4370
页数:6
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