TVOC refers to Total Volatile Organic Compounds, which is one of the air quality detection standards, mainly including benzene, alkanes, aromatic hydrocarbons, alkenes, halogenated hydrocarbons, esters, aldehydes, ketones and others. Organic matter with a saturated vapor pressure exceeding 133.32pa at room temperature and a boiling point between 50℃ and 250℃ will exist in the air in the form of evaporation.
TVOC is not a single gas, because its components are hydrocarbons, halogenated hydrocarbons, oxygen hydrocarbons and nitrogen hydrocarbons, including: benzene series, organic chlorides, freon series, organic ketones, amines, alcohols, ethers, esters, acids and petroleum compounds. It is a variety of volatile organic compounds.
TVOC comes from a variety of sources, including building materials, decorative materials, daily necessities and office supplies. For example, artificial boards, foam insulation materials, plastic sheets, paints, coatings, adhesives, wallpapers, carpets, cosmetics and detergents may release total volatile organic compounds. In addition, household fuels, smoking, human excrement, outdoor industrial waste gas, automobile exhaust, etc. are also sources of TVOC.
The concentration of indoor TVOC is usually between 0.2mg/m³ and 2mg/m³. However, this value may be dozens of times higher when the decoration is improper. The main components of TVOC are benzene and chlorinated hydrocarbons, which mainly come from indoor decoration materials such as paint, wallpaper, putty and adhesive. TVOC produced by indoor decoration will damage human health, and its pollution effect lasts for a long time and is not easy to reduce over time.
| Category | Full Form | Boiling Point Range | Examples | Common Sources |
|---|---|---|---|---|
| VVOC | Very Volatile Organic Compounds | < 0 to 50°C | Propane, Butane, Acetaldehyde | Fuels, Refrigerants, Aerosols |
| VOC | Volatile Organic Compounds | 50 to 260°C | Benzene, Formaldehyde, Toluene | Paints, Solvents, Cleaning Products |
| SVOC | Semi-Volatile Organic Compounds | 260 to 400°C | Pesticides, Phthalates, PCBs | Plastics, Furniture, Insecticides |
| TVOC | Total Volatile Organic Compounds | Combination of VVOC, VOC, and SVOC | Mixture of various VOCs | Indoor air pollution, Industrial emissions |