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

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 m−3 enabling a calculated limit of detection (LOD) at 0.14 mmol m−3 (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.

[1]  Arthur C. Stern,et al.  Measuring, monitoring, and surveillance of air pollution , 1976 .

[2]  C J Weschler,et al.  Ozone in indoor environments: concentration and chemistry. , 2000, Indoor air.

[3]  P Wolkoff,et al.  Formation of strong airway irritants in terpene/ozone mixtures. , 2000, Indoor air.

[4]  John Burnett,et al.  Determination of Ozone Emission from a Domestic Air Cleaner and Decay Parameters using Environmental Chamber Tests , 2005 .

[5]  S. Nizkorodov,et al.  Quantification of Ozone Levels in Indoor Environments Generated by Ionization and Ozonolysis Air Purifiers , 2006, Journal of the Air & Waste Management Association.

[6]  B. Mizaikoff,et al.  Near-Infrared Hollow Waveguide Gas Sensors , 2011, Applied Spectroscopy.

[7]  Boris Mizaikoff,et al.  Mid-Infrared Trace Gas Analysis with Single-Pass Fourier Transform Infrared Hollow Waveguide Gas Sensors , 2009, Applied spectroscopy.

[8]  R. Kaiser,et al.  On the formation of ozone in oxygen-rich solar system ices via ionizing radiation. , 2011, Physical chemistry chemical physics : PCCP.

[9]  A. Lambrecht,et al.  Optimizing Gas Sensors Based on Quantum Cascade Lasers and Photonic Bandgap Hollow Waveguides , 2007, 2007 IEEE Sensors.

[10]  J. Harrison,et al.  Response of chemiluminescence NOx analyzers and ultraviolet ozone analyzers to organic air pollutants. , 1985, Environmental science & technology.

[11]  R. Hickel,et al.  Effectiveness of ozone against periodontal pathogenic microorganisms. , 2011, European journal of oral sciences.

[12]  B. Mizaikoff,et al.  Breath analysis with broadly tunable quantum cascade lasers. , 2013, Analytical chemistry.

[13]  Boris Mizaikoff,et al.  Infrared hollow waveguide sensors for simultaneous gas phase detection of benzene, toluene, and xylenes in field environments. , 2011, Analytical chemistry.

[14]  R. Corsi,et al.  Ozone reactions with indoor materials during building disinfection , 2007 .

[15]  Y Matsuura,et al.  Optical properties of small-bore hollow glass waveguides. , 1995, Applied optics.

[16]  Timothy Day,et al.  External cavity widely tunable quantum cascade laser based hollow waveguide gas sensors for multianalyte detection , 2009 .

[17]  Toshikazu Ohkubo,et al.  The effect of corona wire heating on the downstream ozone concentration profiles in an air-cleaning wire-duct electrostatic precipitator , 1990 .

[18]  F. E. Grahek,et al.  A small, high-sensitivity, medium-response ozone detector suitable for measurements from light aircraft , 1992 .

[19]  Thomas Piazza.  Survey of the use of ozone-generating air cleaners by the California public , 2007 .

[20]  M. Proffitt,et al.  Fast‐response dual‐beam UV‐absorption ozone photometer suitable for use on stratospheric balloons , 1983 .

[21]  James A. Harrington,et al.  Small-Bore Hollow Waveguide Infrared Absorption Cells for Gas Sensing , 1996 .

[22]  C. Eipel,et al.  Determination of ozone in ambient air with a chemiluminescence reagent film detector , 2003 .

[23]  Boris Mizaikoff,et al.  Substrate-integrated hollow waveguides: a new level of integration in mid-infrared gas sensing. , 2013, Analytical chemistry.

[24]  Boris Mizaikoff,et al.  Hollow-waveguide gas sensing with room-temperature quantum cascade lasers , 2003 .

[25]  William W. Nazaroff,et al.  Indoor air chemistry: cleaning agents, ozone and toxic air contaminants. , 2006 .

[26]  G. Barbosa‐Cánovas,et al.  Disinfection of selected vegetables under nonthermal treatments: Chlorine, acid citric, ultraviolet light and ozone , 2013 .

[27]  H. Fischer,et al.  Remote Sensing of Atmospheric Trace Constituents Using Mid-IR Fourier Transform Spectrometry , 1992, Optical Remote Sensing of the Atmosphere.

[28]  Kerry L. Sublette,et al.  Effectiveness of Portable Indoor Air Cleaners: Sensory Testing Results , 1994 .

[29]  D. Beighton,et al.  Assessment of the Ozone-Mediated Killing of Bacteria in Infected Dentine Associated with Non-Cavitated Occlusal Carious Lesions , 2007, Caries Research.

[30]  N. Lima,et al.  Use of ozone to reduce molds in a cheese ripening room. , 2003, Journal of food protection.

[31]  N. Christofi,et al.  Killing bacteria present on surfaces in films or in droplets using microwave UV lamps , 2008 .

[32]  J A Harrington,et al.  Attenuation of incoherent infrared radiation in hollow sapphire and silica waveguides. , 1991, Optics letters.

[33]  Boris Mizaikoff,et al.  Quantum cascade lasers for mid-infrared spectroscopy , 2002 .

[34]  U. Schurath,et al.  Principle and application of a fast sensor for atmospheric ozone , 1991 .