substances are volatile organic substances. VOC is the abbreviation of volatile organic compounds. In general, VOC is the command of organic compounds; but in the sense of environmental protection, VOC is defined as a kind of active volatile organic compounds, that is, the kind of volatile organic compounds that will cause harm. VOC can be divided into two categories:
One is the general definition of VOC, which only describes what is VOC or under what conditions it is VOC. The other is the definition of environmental protection, that is to say, the kind of volatile organic compounds that are active and harmful. It is obvious that volatilization and participation in photochemistry are very important in the sense of environmental protection. Without volatilization or participation in atmospheric photochemistry, no harm will be caused.
In China, VOCs (volatile organic compounds) are volatile organic compounds. It refers to the organic compounds with saturated vapor pressure greater than 70 Pa at room temperature, boiling point below 260 C at atmospheric pressure, or all organic compounds with relative volatility greater than or equal to 10 Pa at 20 C. From the point of view of environmental monitoring, it refers to the non-methane total hydrocarbons detected by hydrogen flame ion detector. Generally speaking, it mainly includes alkanes, aromatics, olefins, halogens, esters, aldehydes, ketones and other organic compounds. It is important to note that VOC and VOCS are actually the same kind of substances, that is, the abbreviation of Volatile Organic Compounds (VOCS). VOCS is more precise because there are more than one general component of VOCs.
TVOC and VOC are the relationship between inclusion and inclusion. Various measured VOCs are collectively referred to as total volatile organic compounds (TVOC). So TVOC
is one of the three major types of indoor air quality pollution. TVOC
is an organic substance with saturated vapor pressure over 133.32 Pa at room temperature. Its boiling point is between 50 and 250 degrees. It can be evaporated in the air at room temperature. Its toxicity, irritation, carcinogenicity and special odor will affect the skin and mucosa and cause acute damage to human body.