Overview
Rarefied Air Environmental performs Volatile Organic Compound (VOC) and Formaldehyde air sampling to evaluate indoor air quality (IAQ) and identify potential chemical sources that may impact occupant health. VOCs are gases emitted from many common materials such as paints, cleaning products, furnishings, and building materials. Formaldehyde is a specific VOC often associated with wood products, glues, and finishes and is classified as a human carcinogen.
VOCs can cause symptoms such as eye, nose, or throat irritation; headaches; fatigue; or nausea. Chemically sensitive individuals, children, and those with respiratory conditions may react even at lower concentrations.
How We Conduct the Sampling
VOC Sampling
VOC samples are collected using a low-flow calibrated pump connected to a glass sampling tube. The pump draws air through the tube at approximately 200 milliliters per minute for two to four hours. Prior to testing, all windows and exterior doors should remain closed for at least 12 hours to ensure representative indoor conditions. Samples are typically collected about 3–5 feet above the floor, representing the normal breathing zone.
The collected samples are then sent to an accredited independent laboratory for detailed analysis following EPA Method TO-17 and ISO 16000-6. Results identify total VOC levels (TVOC) as well as individual compound groups linked to building materials, lifestyle products, or possible mold activity (TMVOC).
Formaldehyde Sampling
Formaldehyde air sampling uses a specialized sorbent tube and pump that collects air at 200 milliliters per minute for about 20–30 minutes. This method is sensitive to very low concentrations (detection limit below 5 ng/L) and provides accurate measurements even in normal indoor environments.
Samples are analyzed using the Hantzsch (acetylacetone) method, which is compliant with U.S. and international air quality standards.
What the Results Mean for You
Test results provide an overview of your home or building’s chemical air quality and help identify the most likely sources of pollutants. Reducing VOCs and formaldehyde can often be achieved through:
- Increasing ventilation and using air filtration systems.
- Removing or sealing chemical-emitting materials and products.
- Properly storing cleaners, solvents, and personal care products.
- Controlling humidity and moisture to prevent mold-related VOCs.
By understanding the sources and levels of VOCs and formaldehyde in your space, you can take targeted steps to improve indoor air quality, creating a safer and healthier environment for occupants.