What is tvoc?

- Mar 15, 2018-

What is tvoc? Where does it come from? Is it harmful to the human body? TVOC is an abbreviation for it, and is called: (Total Volatile Organic Compounds). Indoor air quality researchers usually refer to all indoor organic gaseous substances they sample and analyze as VOCs. It is an abbreviation for the first letter of Volatile Organic Compound, and the various measured VOCs are collectively referred to as Total Volatile Organic Compounds (TVOCs).

The main sources of TVOC are outdoors, mainly from fuel combustion and transportation: while in the interior, it mainly comes from combustion products such as coal and natural gas, smoke from smoking, heating and cooking, construction and decoration materials, furniture, household appliances, and detergents. And the body's own emissions. There are nearly a thousand species. In the interior decoration process, VOCs mainly come from paints, coatings and adhesives. According to reports, indoor TVOC concentration is usually between 0.2mg/m3 and 2mg/m3, and in inappropriate decoration construction, it can even be several times higher. Indoor a variety of aromatics and alkanes are mainly from automobile exhaust (76%-92%). The general paint towel TVOC content is 0.4-1.mg/m3. Li Li et al. pointed out that due to the strong volatility of TVOC, under normal circumstances, 90% of the TVOC's can be volatilized within 10 hours after the paint is applied, while the TVOC in the solvent only releases 25% of the total during the paint drying process.

The next question is that many people would like to know is this TVOC harm to the human body in the end? TVOC can have odor, irritant, and some compounds are genotoxic. At present, it is believed that TVOC can cause the imbalance of the body's immunity and affect the function of the central nervous system and digestive system. Mild skin allergies, sore throat, headache, dizziness, drowsiness, chest tightness, fatigue, loss of appetite, nausea and other symptoms. Severe cases can cause bronchitis, allergic asthma, pneumonia, and pulmonary edema. In severe cases, liver and hematopoietic system functions may be damaged and allergic reactions may occur.

It is generally believed that the normal, non-industrial indoor environment TVOC concentration level is not yet enough to cause human body tumors and cancer. When TVOC concentration is 3.0-25 mg/m3, irritation and discomfort may occur. When combined with other factors, headache may occur. When VOC concentration is greater than 25 mg/m3, other neurotoxic effects may occur in addition to headache. . Experts suggest that to solve this indoor air quality problem, first of all, indoor windows should be ventilated and some green plants should be planted. Adding an air purifier to your home is also a good choice for purifying the air.