Explain your knowledge of air quality monitoring methods and the instruments you are familiar with.

Sample interview questions: Explain your knowledge of air quality monitoring methods and the instruments you are familiar with.

Sample answer:

Air Monitoring Methods:

Continuous Monitoring: Instruments provide real-time data on air quality. Methods include:
- Gas chromatography-mass spectrometry (GC-MS): Identifies and quantifies specific pollutants in air samples.
- Fourier transform infrared (FTIR) spectroscopy: Measures molecular vibrations to determine pollutant concentrations.
- Chemiluminescence: Measures ozone concentration.
Passive Monitoring: Collects samples over extended periods (days to months) using sorbent tubes or badges. Methods include:
- Diffusion tubes: Passive sampling with a sorbent material that absorbs specific pollutants.
- Badge monitors: Personal sampling devices that measure exposure to pollutants.
Active Monitoring: Collects air samples using a pump and filter. Methods include:
- Hi-volume samplers: High-volume air samples collected on filters for laboratory analysis.
- Low-volume samplers: Smaller air samples collected for specific pollutants.

Instruments:

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