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Real-time monitoring of ozone in air using substrate-integrated hollow waveguide mid-infrared sensors

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep03174· OSTI ID:1624668
 [1];  [2];  [3];  [3];  [4];  [5];  [3]
  1. Sao Paulo State Univ. (Brazil). Dept. of Analytical Chemistry; Univ. of Ulm (Germany). Inst. of Analytical and Bioanalytical Chemistry; DOE/OSTI
  2. Univ. of Ulm (Germany). Inst. of Analytical and Bioanalytical Chemistry; Univ. of Campinas (UNICAMP), Sao Paulo (Brazil). Dept. of Analytical Chemistry
  3. Univ. of Ulm (Germany). Inst. of Analytical and Bioanalytical Chemistry
  4. Univ. of Campinas (UNICAMP), Sao Paulo (Brazil). Dept. of Analytical Chemistry
  5. Sao Paulo State Univ. (Brazil). Dept. of Analytical Chemistry
Ozone is a strong oxidant that is globally used as disinfection agent for many purposes including indoor building air cleaning, during food preparation procedures, and for control and killing of bacteria such as E. coli and S. aureus. However, it has been shown that effective ozone concentrations for controlling e.g., microbial growth need to be higher than 5 ppm, thereby exceeding the recommended U.S. EPA threshold more than 10 times. Consequently, real-time monitoring of such ozone concentration levels is essential. Here, we describe the first online gas sensing system combining a compact Fourier transform infrared (FTIR) spectrometer with a new generation of gas cells, a so-called substrate-integrated hollow waveguide (iHWG). The sensor was calibrated using an UV lamp for the controlled generation of ozone in synthetic air. A calibration function was established in the concentration range of 0.3–5.4 mmol m23 enabling a calculated limit of detection (LOD) at 0.14 mmol m23 (3.5 ppm) of ozone. Given the adaptability of the developed IR sensing device toward a series of relevant air pollutants, and considering the potential for miniaturization e.g., in combination with tunable quantum cascade lasers in lieu of the FTIR spectrometer, a wide range of sensing and monitoring applications of beyond ozone analysis are anticipated.
Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1624668
Journal Information:
Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 3; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (5)

Carbon Nanofiber-Based Functional Nanomaterials for Sensor Applications journal July 2019
Gas Detection Using Portable Deep-UV Absorption Spectrophotometry: A Review journal November 2019
A Hyphenated Preconcentrator-Infrared-Hollow-Waveguide Sensor System for N2O Sensing journal April 2018
Monitoring of hydrogen sulfide via substrate-integrated hollow waveguide mid-infrared sensors in real-time journal January 2014
Dioxin and Related Compound Detection: Perspectives for Optical Monitoring journal May 2019

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