The total volatile organic compounds are represented by TVOC, which is an abbreviation for total volatile organic compounds. TVOC refers to the analysis of known and unknown volatile organic compounds with a retention time between n-hexane and n-hexadecane and including them by gas chromatography non-polar column.
The indoor TVOC is mainly distributed from building materials, interior materials and living and office supplies. Such as wood-based panels, foam insulation materials, plastic sheets in building materials, paints, coatings, adhesives, wallpapers, carpets in interior decoration materials, cosmetics and detergents used in daily life, office supplies mainly refer to inks and copiers. , typewriters, etc. In indoor air pollution caused by interior decoration materials, TVOC is a kind of pollutant that is very common and harmful to the human body. Its characteristics are: many types, complex components, long-term low-dose release, which is harmful to the human body. Its release is mainly due to the use of solvent-based coatings containing a large amount of organic solvents and various sheet adhesives used in home decoration.
In addition, household fuels and smoking, human waste and outdoor industrial waste gas, automobile exhaust, and photochemical pollution are also major factors affecting the total volatile organic compounds (TVOC) content in the room.
Volatile organic compounds are represented by VOC, which is an abbreviation for votatile organic compound. VOC refers to a compound having a boiling point between (50 and 100) °C and (240 to 260) °C.
VOC refers to volatile organic compounds in the air, mainly including aromatic hydrocarbons such as benzene and benzene series, and some aliphatic hydrocarbons.
It is generally believed that the normal, non-industrial indoor environmental VOC content does not cause tumors and cancer in the human body. When the VOC content is (3.0 ~ 25) mg / m3, it will cause irritation; when combined with other factors, headache may occur; when the VOC content is greater than 25mg / m3, in addition to headache, other neurotoxic effects may occur .
Current research shows that VOC can cause imbalance of immune level, affect central nervous system function, and have symptoms such as dizziness, headache, lethargy, weakness, chest tightness, etc. It may also affect the digestive system, loss of appetite, nausea, etc. And hematopoietic system.
In the GB 50 325-2001 "Code for Indoor Environmental Pollution Control of Civil Building Engineering" promulgated by the state, the content of TVOC in indoor air has become an important item for evaluating the indoor air quality of the living room. The TVOC content specified in this standard is Class I civil construction: 0.5 mg/m3, Class II civil construction: 0.6 mg/m3.
In addition, GB/T 18883--2002 "Indoor Air Quality Standards" stipulates that the TVOC limit in indoor air is 0.6 mg/m3.
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