With the rapid development of the decoration industry, the number of types of decoration materials has rapidly increased. Plates, paints, wallpapers, floors, curtains, glues and so on. The increase in the number of types of decoration materials has also brought more harmful substances. What are the contents of that indoor air quality test ? What are the indoor air quality inspection methods? Following Xiaobian look at it. What are the contents of indoor air quality testing First, formaldehyde Formaldehyde is colorless and has a strong odor. Formaldehyde-based irritant gas, its 35% to 40% of the aqueous solution known as formalin. -92 ° C melting point, boiling point -21 ° C, the density of the liquid when the 0.815 g / 3 cm (20 ° C). Formaldehyde is a toxin of the original pulp and can bind to proteins. After inhaling high concentrations of formaldehyde, severe respiratory irritations, edema, eye irritation, and headache can occur. Bronchial asthma can also occur. Direct contact with formaldehyde on the skin can cause dermatitis, pigmentation, and necrosis. Frequent inhalation of small amounts of formaldehyde can cause chronic poisoning, mucosal congestion, skin irritation, allergic dermatitis, nail keratinization and fragility, and pain in the nail bed. Systemic symptoms include headache, fatigue, appetite, palpitations, insomnia, weight loss, and autonomic disorders. Long-term exposure to low-dose formaldehyde can cause chronic respiratory diseases, menstrual disorders, and pregnancy syndrome, which can lead to reduced physical fitness and chromosome abnormalities. It even causes nasopharyngeal cancer. High concentrations of formaldehyde are toxic to the nervous system, the immune system, and the liver. Formaldehyde also has teratogenic and carcinogenic effects. People who have long-term exposure to formaldehyde may cause cancers such as nasal cavity, oral cavity, nasopharyngeal, throat, skin and digestive tract. Formaldehyde can be contained in various artificial boards (particle board, fiber board, plywood, etc.) due to the use of a binder. The production of new furniture, wall and floor decoration, use adhesives. Wherever adhesives are used in large quantities, formaldehyde is always released. In addition, some chemical fiber carpets and paints also contain a certain amount of formaldehyde. Formaldehyde can also come from cosmetics. Cosmetics, detergents, insecticides, disinfectants, preservatives, printing inks, paper, textile fibers and many other chemical light industrial products. Second, benzene Benzene is a colorless liquid with a special aromatic odor. It has a melting point of 5.5°C and a boiling point of 80.1°C. It is soluble in alcohol, ether, acetone and carbon tetrachloride and slightly soluble in water. Benzene is volatile, flammable, and its vapor is explosive. Often exposed to benzene, the skin may become dry due to defatting, desquamation, and some appear allergic eczema. Prolonged inhalation of benzene can cause aplastic anemia. Benzene vapor is toxic, and acute poisoning can cause cramps and even loss of consciousness in severe cases; chronic poisoning can damage hematopoietic function. Benzene is mainly derived from a large number of chemical raw materials used in architectural decoration, such as paints, wood lacquers, adhesives and various organic solvents. During the process of film formation and curing of the coating, volatile components such as formaldehyde and benzene contained in the coating will be released from the coating and cause contamination. Third, TVOC TVOC is also known as total volatile organic compounds. Among them, volatile organic compounds are commonly referred to as VOCs. It is an abbreviation for the first letter of the three words Volatile Organic Compound, but is sometimes also expressed by TVOC, a total volatile organic compound. TVOC is one of the more serious types of airborne organic pollutants (PAHs, VOCs, and aldehydes). VOC refers to an organic substance whose saturated vapor pressure exceeds 133.32 MPa at room temperature. Its boiling point is in the range of 50° C. to 250° C., and it can be evaporated in the form of air at room temperature. Its toxicity, irritation, carcinogenicity and special odor. It affects the skin and mucous membranes and causes acute damage to the human body. Some compounds in TVOC are genotoxic. Indoor TVOC total volatile organics contain: benzene, toluene, p-xylene, m-xylene, o-xylene, styrene, ethylbenzene, butyl acetate, undecane, and the like. In addition to the above three toxic substances, there are toluene, xylene, nitrogen, helium and so on. Conduct indoor air testing to make us a healthy living condition. What are the indoor air quality inspection methods? First, close doors and windows 12 to 24 hours before testing indoor air quality; (but not as long as possible, the general detector is in this range); Second, do not easily believe the free indoor test information, there is no free lunch in the world, wool in sheep. If the home conditions permit, it is better to find a more formal non-commercial machine testing (Weihai City Environmental Protection Bureau, Quality and Technical Supervision Bureau), etc.; poor commercial organizations to test the product for the first time will often say that your home's harmful gases Excessive weight, and once you use its governance products, he will also say that your home's indoor environment is up to standard; Third, in fact, the operation of the testing equipment is not so complicated. In order to prevent obscure detection agencies from obscure operations, you must remember to say good times in advance to seal the room and collect air samples for the first time. The two detection times are inconsistent) Fourth, in fact, the general indoor testing site can produce results without having to go back to the so-called laboratory analysis, because (if it is a laboratory, it is generally only government agencies such as the Bureau of Quality and Technical Supervision, the general commercial testing agency is No, building a standard laboratory requires 20-30 million.) Businesses who have this 20-30 million might as well do more advertising; when they go back to the analysis, the result is not necessarily what they say. How many! The above content introduces what needs to be paid attention to in the inspection of indoor air quality . I hope everyone can help you after understanding. If you would also like to learn more about loft building, you can log in to this website to learn more about it. 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