With the improvement of people's indoor environmental awareness, people are more and more concerned about the impact of the indoor environment on themselves and their families. So, how to determine the environment in which you and your family live and work is safe and healthy? Then indoor air testing it!
Indoor air testing to detect the content:
First, formaldehyde
Formaldehyde is colorless and has a strong odor. Formaldehyde structural irritating gas, 35% to 40% aqueous solution is commonly known as formalin. Melting point -92 ℃, the boiling point of -21 ℃, liquid density of 0.815 g / 3 cm (20 ℃). Formaldehyde is puree poison, with protein binding, inhalation of high concentrations of formaldehyde, there will be severe respiratory irritation and edema, eye irritation, headache, bronchial asthma may also occur. Skin contact with formaldehyde directly, can cause dermatitis, pigmentation, necrosis. Often inhaled a small amount of formaldehyde, can cause chronic poisoning, mucosal hyperemia, skin irritation, atopic dermatitis, nail keratosis and fragility, finger nail pain and so on. Systemic symptoms are headache, fatigue, poor appetite, palpitations, insomnia, weight loss and autonomic disorders, chronic exposure to low doses of formaldehyde can cause chronic respiratory disease, menstrual disorders, pregnancy syndrome, neonatal hypothyroidism, chromosomal abnormalities, Even cause nasopharyngeal cancer. High concentrations of formaldehyde on the nervous system, immune system, liver and other toxic. Formaldehyde also teratogenic, carcinogenic effects. Long-term exposure to formaldehyde may cause nasal, oral, nasopharyngeal, throat, skin and gastrointestinal cancer.
Various man-made board (particleboard, fiberboard, plywood, etc.) due to the use of adhesives, it can contain formaldehyde. The production of new furniture, wall, floor decoration, use adhesives. Where a large number of adhesives, there will always be formaldehyde release. In addition, some chemical fiber carpets, paint coatings also contain a certain amount of formaldehyde. Formaldehyde can also come from cosmetics. Cosmetics, detergents, pesticides, disinfectants, preservatives, printing inks, paper, textile fibers and other chemical light industrial products.
Second, benzene
Benzene is a colorless, aromatic liquid with a special melting point of 5.5 ° C and a boiling point of 80.1 ° C. It is miscible with alcohols, ethers, acetone and carbon tetrachloride and slightly soluble in water. Benzene is volatile and flammable, and its vapor is explosive. Often exposed to benzene, the skin can be due to skim and become dry, scaling, and some allergic eczema. Long-term inhalation of benzene can lead to aplastic anemia. Benzene vapor toxic, acute poisoning can cause cramps in severe cases, or even unconscious; chronic poisoning can damage hematopoietic function. Benzene mainly from building decoration in the extensive use of chemical raw materials, such as coatings, wood coatings, adhesives and various organic solvents. In the coating film forming and curing process, which contains formaldehyde, benzene and other volatile components will be released from the paint, causing pollution.
Third, TVOC
TVOC, also known as total volatile organic compounds, volatile organic compounds commonly used VOC said it is Volatile Organic Compound three acronym for the first three letters of the acronym, but sometimes with the total volatile organic compounds TVOC said.
TVOC is one of the three air pollutants (polycyclic aromatic hydrocarbons, volatile organic compounds and aldehydes) that have a more serious impact. VOC refers to organic compounds with a saturated vapor pressure of more than 133.32 Pa at room temperature. Their boiling point is between 50 ° C and 250 ° C. They are vaporized at room temperature in the air. Their toxicity, irritation, carcinogenicity and special odor , Can affect the skin and mucous membranes, causing acute damage to the human body, and some compounds in TVOC are genotoxic.
Indoor TVOC total volatile organic compounds containing: benzene, toluene, p-xylene, m-xylene, o-xylene, styrene, ethylbenzene, butyl acetate, undecane and so on.
In addition to the above three kinds of toxic substances, there are toluene, xylene, nitrogen, radon and so on.