Optical detection of formaldehyde in air in the 3.6 μm range

被引：13
|
作者：
Winkowski, Mateusz [1 ]
Stacewicz, Tadeusz [1 ]
机构：
[1] Univ Warsaw, Inst Expt Phys, Fac Phys, Pasteura 5, PL-02093 Warsaw, Poland
来源：
BIOMEDICAL OPTICS EXPRESS | 2020年 / 11卷 / 12期
关键词：
INTERBAND CASCADE LASER; MULTIPASS ABSORPTION CELLS; VOLATILE ORGANIC-COMPOUNDS; TRACE-GAS DETECTION; INTERFERENCE-FRINGES; PHOTOACOUSTIC-SPECTROSCOPY; BREATH ANALYSIS; LUNG-CANCER; REDUCTION; SENSOR;
D O I：
10.1364/BOE.405384
中图分类号：
Q5 [生物化学];
学科分类号：
071010 ; 081704 ;
摘要：
The optical detector of formaldehyde designed for sensing cancer biomarkers in air exhaled from human lungs with possible application in free atmosphere is described. The measurements were performed at wavelengths ranging from 3595.77-3596.20 nm. It was stated that at the pressure of 0.01 atm this absorption band exhibits the best immunity to typical interferents that might occur at high concentration in human breath. Multipass absorption spectroscopy was also applied. The method of optical fringes quenching by wavelength modulation and signal averaging over the interferences period was presented. The application of such approaches enabled the detection limit of about single ppb to be achieved. (c) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码：7019 / 7031
页数：13
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