Stand-Off Detection of Alcohol Vapors Exhaled by Humans

Młyńczak, Jarosław; Kubicki, Jan; Kopczyński, Krzysztof

doi:10.3390/s18051310

Cited by 4 publications

(3 citation statements)

References 9 publications

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“…A broadly-tunable ECQCL operating at 20 Hz spectral sweep rate and spectral resolution of 4 cm −1 was used for standoff gas-phase chemical detection over 300-600 m distances using a corner-cube retroreflector, from which noise equivalent concentration length (NECL) values as low as 0.75 ppm•m in 2-5 s averaging times were estimated for strongly absorbing chemicals [90]. The main application scenarios include measurement of greenhouse gas emissions [91], hazardous gas detection in underground coal mines [92], atmospheric composition monitoring [93][94][95], leak detection in petroleum storage tanks [87], standoff detection of alcohol vapors exhaled by humans [96], etc. Most recently, it has been utilized for food volatiles detection and handheld TDLAS sensor to detect meat spoilage [97].…”

Section: Tdlas With Retroreflectorsmentioning

confidence: 99%

Standoff Chemical Detection Using Laser Absorption Spectroscopy: A Review

et al. 2020

Remote Sensing

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Remote chemical detection in the atmosphere or some specific space has always been of great interest in many applications for environmental protection and safety. Laser absorption spectroscopy (LAS) is a highly desirable technology, benefiting from high measurement sensitivity, improved spectral selectivity or resolution, fast response and capability of good spatial resolution, multi-species and standoff detection with a non-cooperative target. Numerous LAS-based standoff detection techniques have seen rapid development recently and are reviewed herein, including differential absorption LiDAR, tunable laser absorption spectroscopy, laser photoacoustic spectroscopy, dual comb spectroscopy, laser heterodyne radiometry and active coherent laser absorption spectroscopy. An update of the current status of these various methods is presented, covering their principles, system compositions, features, developments and applications for standoff chemical detection over the last decade. In addition, a performance comparison together with the challenges and opportunities analysis is presented that describes the broad LAS-based techniques within the framework of remote sensing research and their directions of development for meeting potential practical use.

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Section: Tdlas With Retroreflectorsmentioning

confidence: 99%

Standoff Chemical Detection Using Laser Absorption Spectroscopy: A Review

et al. 2020

Remote Sensing

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“…Based on Ref. 16, in which the described set of lasers was used and tested, it can be stated that in the aforementioned time frame of the order of several seconds, the power ratio of the laser beams could not change >0.02%.…”

Section: Experimental Verification Of Possibility To Detect Alcohol Vmentioning

confidence: 99%

Remote detection of heterogeneously spread alcohol vapors in the cabins of moving vehicles

Kubicki

Młyńczak

Kopczyński

2019

J. Appl. Rem. Sens.

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This study concerns remote detection of alcohol vapors in cabins of moving vehicles. By means of a simplified description of propagation of two combined laser beams differently absorbed in alcohol vapors and in vehicle windowpanes, difficulties in detecting alcohol vapors in vehicle cabins using classical differential absorption method are demonstrated. Unreported in the literature, this method of remote detection of alcohol vapors in the air exhaled by a driver or a passenger in moving vehicles is proposed. The method uses two combined laser beams that illuminate different zones in the car cabin through the same windowpane. Based on the correlation between the spread of the transmission of these zones and the alcohol concentration in the air exhaled by a drunken person, it is possible to determine if the alcohol exists in the exhaled air. The effectiveness of the presented method is confirmed experimentally. © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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“…Additionally, consumers and governments can require ethanol sensors for noninvasive food quality control [ 7 ]. Furthermore, breath analyzers have high market value given the continuous pursuit for a low-cost and comfortable tool to estimate blood alcohol content from a breath sample [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Silver Enhances Hematite Nanoparticles Based Ethanol Sensor Response and Selectivity at Room Temperature

Garcia-Osorio

Hidalgo-Falla

Peres

et al. 2021

Sensors

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Gas sensors are fundamental for continuous online monitoring of volatile organic compounds. Gas sensors based on semiconductor materials have demonstrated to be highly competitive, but are generally made of expensive materials and operate at high temperatures, which are drawbacks of these technologies. Herein is described a novel ethanol sensor for room temperature (25 °C) measurements based on hematite (α‑Fe2O3)/silver nanoparticles. The AgNPs were shown to increase the oxide semiconductor charge carrier density, but especially to enhance the ethanol adsorption rate boosting the selectivity and sensitivity, thus allowing quantification of ethanol vapor in 2–35 mg L−1 range with an excellent linear relationship. In addition, the α-Fe2O3/Ag 3.0 wt% nanocomposite is cheap, and easy to make and process, imparting high perspectives for real applications in breath analyzers and/or sensors in food and beverage industries. This work contributes to the advance of gas sensing at ambient temperature as a competitive alternative for quantification of conventional volatile organic compounds.

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Stand-Off Detection of Alcohol Vapors Exhaled by Humans

Cited by 4 publications

References 9 publications

Standoff Chemical Detection Using Laser Absorption Spectroscopy: A Review

Standoff Chemical Detection Using Laser Absorption Spectroscopy: A Review

Remote detection of heterogeneously spread alcohol vapors in the cabins of moving vehicles

Silver Enhances Hematite Nanoparticles Based Ethanol Sensor Response and Selectivity at Room Temperature

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