What's VOC?

- Mar 15, 2018 -

VOC refers to volatile organic compounds (VOCs) in the air, VOCs refers to volatile organic compounds, and TVOC refers to a range of total volatile organic compounds.


VOCs mainly include benzenes, alkanes, aromatics, alkenes, halocarbons, esters, aldehydes, ketones, and others. The most common are formaldehyde, benzene, toluene, xylene, styrene, benzo[a]pyrene, trichloroethylene, chloroform, trichloroethane, diisocyanate, diisocytotoluene ester, and the like. The main sources of VOC in the air are:


1. Building materials, interior decoration materials, and living and office supplies. For example: organic solvents, paints, aqueous coatings, chemical carpets, clothing fabrics, detergents, etc.;


2. Incomplete combustion of domestic fuel and tobacco leaves, human excreta;


3, outdoor industrial exhaust, automobile exhaust, photochemical smog, etc.;


Our country's standard for TVOC content in the air is 0.6mg/m3. In case of excessive standards, eye discomfort, burning, dryness, foreign body sensation, edema, dry throat, itching, shortness of breath, asthma, headache, and anemia will occur. , dizziness, fatigue, irritability and other symptoms.


VOCs may have odor, irritant, and some compounds have a genotoxicity, can cause the body's immune level imbalance, affect the function of the central nervous system, dizziness, headache, drowsiness, weakness, chest tightness and other symptoms; may also affect the digestive system, appear Loss of appetite, nausea, etc., can severely damage the liver and hematopoietic system, allergic reactions occur.


In general, we mainly use formaldehyde, benzene, toluene, xylene, [α]pyrene, and TVOC as the detection indexes for air pollution.