Real Time Analysis of Indoor Air Pollutants for Photocatalytic Research

Background

1

Nowadays we spend most of our time in indoor environments. Minimizing health risks associated with indoor air pollution is therefore of vital importance. Typical indoor contaminants may be allergenic, toxic or carcinogenic and include benzene, toluene and formaldehyde amongst a variety of volatile organic compounds. They are emitted from sources such as heating equipment, furniture, paints and during cigarette smoking.

Air quality can be enhanced significantly by photocatalytic cleaning where contaminants are broken down to harmless products such as H2O and CO2. Research into the kinetics of photocatalysis demands highly sensitive instrumentation that allows for continuous online measurements and immediate response.

Solution

The V&F AirSense mass spectrometer with its proprietary Ion-Molecule Reaction technology (IMR) provides high selectivity and sensitivities down to sub ppb concentration levels. Through direct sampling it facilitates real time continuous measurements of air pollutants and their degradation products after photocatalytic cleaning. The state-of-the-art equipment is well-suited for research purposes and for general online indoor air quality monitoring.

1

Figure: Kinetics of a photocatalytic reduction of components

Advantage

Offline analysis methods cannot provide real time results as they necessitate time consuming sampling procedures and transfer time to the analyzing equipment. IMR-MS circumvents these drawbacks by direct sampling, its capability of continuous online monitoring and immediate presentation of the results. V&F equipment facilitates highly sensitive and highly selective measurements as required for time profiles in kinetic studies where a range of compounds needs to be monitored simultaneously.

Highlights

  • Real time measurements - capability to study kinetics
  • Direct measurement - no sample preparation
  • Monitoring organic and inorganic contaminants at sub ppb levels

Reference customers (excerpt)

1

Applicable instruments

AirSense
2
CombiSense