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Split Point Analysis and Uncertainty Quantification of Thermal-Optical Organic/Elemental Carbon Measurements
Published on: September 7, 2019
A diffusive sampling device for simultaneous determination of ozone and carbonyls
Shigehisa Uchiyama1, Yohei Inaba, Naoki Kunugita
1Department of Environmental Health, National Institute of Public Health, Wako City, Saitama, Japan. uchiyama@niph.go.jp
Analytica Chimica Acta
|April 5, 2011
Summary
A novel diffusive sampling method enables simultaneous air monitoring of ozone and carbonyl compounds. This technique simplifies analysis, offering a practical solution for environmental air quality assessment.
Area of Science:
- Environmental Chemistry
- Analytical Chemistry
Background:
- Ozone and carbonyl compounds are significant air pollutants requiring accurate monitoring.
- Existing methods for simultaneous determination can be complex or lack efficiency.
Purpose of the Study:
- To develop a new, simple diffusive sampling method for simultaneous determination of ozone and carbonyls in air.
- To validate the method's performance and sampling rates.
Main Methods:
- Utilized silica gel impregnated with trans-1,2-bis(2-pyridyl)ethylene (2BPE) and 2,4-dinitrophenylhydrazine (DNPH) as absorbent.
- Employed a porous sintered polyethylene tube as a diffusive membrane and a polypropylene syringe for analyte elution.
- Analyzed hydrazone derivatives of carbonyls and ozone-derived pyridine-2-aldehyde hydrazone using high-performance liquid chromatography (HPLC).
Main Results:
- Successfully developed the diffusive sampling-2BPE/DNPH (DSD-BPE/DNPH) method for simultaneous ozone and carbonyl analysis.
- Determined sampling rates for ozone (44.6 mL min⁻¹) and formaldehyde (72.0 mL min⁻¹), showing good agreement with active sampling.
- Calculated sampling rates for other carbonyls based on molecular weights and Graham's law, aligning with experimental data.
Conclusions:
- The DSD-BPE/DNPH method provides a simple and effective approach for simultaneous air monitoring of ozone and carbonyls.
- This method offers an advantageous alternative for environmental air quality assessment due to its simplicity and simultaneous analysis capability.
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