Indoor air quality researchers usually refer to all indoor organic gaseous substances they sample and analyze as TVOC, which is the abbreviation of the first letter of the three words Volatile Organic Compound. Various measured VOCs are collectively referred to as total volatile organic compounds TVOC. (Total Volatile Organic Compounds)
TVOC is the more serious one among the three types of pollution that affect indoor air quality. TVOC refers to organic matter whose saturated vapor pressure exceeds 133.32pa at room temperature. Its boiling point is between 50°C and 250°C. It exists in the air in the form of evaporation at room temperature. Its toxicity, irritation, carcinogenicity and special odor Sex, can affect the skin and mucous membranes, and cause acute damage to the human body. The World Health Organization (WHO), the National Academy of Sciences/National Research Council (NAS/NRC) and other institutions have always emphasized that TVOC is an important type of air pollutant. The U.S. Environmental Agency (EPA) defines VOC as: except for carbon monoxide, carbon dioxide, carbonic acid, metal carbides, carbonates and ammonium carbonate, any carbon-containing compound that participates in photochemical reactions in the atmosphere.
TVOC hazards: TVOC can smell, irritate, and some compounds are genotoxic. It is believed that TVOC can cause imbalance of the body’s immune level, affect the function of the central nervous system, and experience dizziness, headache, drowsiness, weakness, chest tightness and other conscious symptoms; it may also affect the digestive system, loss of appetite, nausea, etc., and can damage the liver and hematopoiesis in severe cases. System, allergic reactions and so on. The study linked the common exposed TVOC in office buildings with the following SBS symptoms: Eye discomfort: burning, dryness, foreign body sensation, edema. Sore throat: dry throat. Breathing problems: shortness of breath; asthma, headache, anemia, dizziness, fatigue, irritability. It is generally believed that the normal, non-industrial indoor environment TVOC concentration level is not enough to cause tumors and cancers in the human body. When the TVOC concentration is 3.0-25 mg/m3, it will cause irritation and discomfort. When combined with other factors, headache may occur; when the TVOC concentration is greater than 25 mg/m3, other neurotoxic effects may occur besides headache .
What to do if TVOC exceeds the standard: Prevent the damage of TVOC, mainly from the source, to eliminate non-environmental building materials; secondly, often ventilate and even heat and bake to accelerate the release of TVOC; thirdly, place activated carbon, but the effect of activated carbon is not obvious . Fourth, cultivate some green plants such as Chlorophytum and other green plants properly indoors to achieve the effect of purifying indoor air.