1, formaldehyde detection method. First of all, the destination to be detected is required to be closed 12 hours, at least 4-8 hours. Because the sample we need to collect is the concentration of free molecules volatilized into the air per unit time, the concentration of free molecules in this part of harmful gas is too large to cause harm to people. The acquisition volume is 0.5L/min, and the time is10min. The total amount collected is 5L. This value is the standard quantity.
2. Governance process. High temperature fumigation and deodorization process. Fumigating furniture, wooden windows, floors, wallpaper, etc. Made of man-made board with choking smell at high temperature. Fumigating from the inside out. This process requires thorough ventilation and wide opening of doors and windows; This step requires that when the furniture is fumigated at high temperature, the nozzle can be close to the wood-based panel.
However, the distance between wallpaper, furniture surface and leather sofa surface should be 10cm to avoid damaging these items. It is recommended to buy a hair dryer to enhance the ventilation effect and ensure good deodorization conditions for poorly ventilated environments and places with serious odor.
3, the finishing touches after the completion of the governance. Reset furniture, etc. Tidy up equipment, chemicals, etc. ; After the treatment, all doors and windows of the treatment site will be sealed and closed for at least 12 hours. Then start ventilation, and guarantee the standard after three days.
Extended data:
Harm of formaldehyde:
1, irritation: The main harm of formaldehyde is irritation to skin and mucosa. When indoor formaldehyde reaches a certain concentration, people will feel uncomfortable. Formaldehyde concentration greater than 0. 15mg/ m3 can cause envy, itching, sore throat, hoarseness, sneezing, chest tightness, asthma, dermatitis and so on.
2. Acute poisoning reaction: Excessive formaldehyde concentration can cause acute poisoning, manifested as burning pain in throat, dyspnea, pulmonary edema, allergic purpura, allergic dermatitis, elevated liver transaminase and jaundice.
3. Chronic hazard: formaldehyde has a pungent smell and can be smelled at low concentration. The olfactory threshold of formaldehyde is usually 0.06~0.07 mg per cubic meter.
References:
People's Health Network-in addition to formaldehyde window ventilation is the "king"