Several super practical basic judgment methods on

2022-07-22
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Formaldehyde is a colorless and harmful gas. Long term exposure will cause cancer of nose, mouth, throat, skin and digestive tract. The formaldehyde in the house mainly comes from all kinds of wood, furniture, paint and other decorative materials. According to national/national mandatory/regulatory standards, formaldehyde emission per cubic meter of indoor air shall not be greater than 0.08 mg after closing doors and windows for 1 hour; If it reaches 0.1-2.0 mg, 50% of normal people can smell odor; When it reaches 2.0-5.0 mg, the eyes and trachea will be strongly stimulated, and there will be sneezing, coughing and other symptoms; Reach more than 10 mg, dyspnea; If it reaches more than 50 mg, it will cause critical diseases such as pneumonia, and even cause/death. Therefore, the gold standard test next introduces how to detect formaldehyde after the decoration of the new house

formaldehyde is a colorless and harmful gas, and long-term exposure will cause cancer of nose, mouth, throat, skin and digestive tract. The formaldehyde in the house mainly comes from all kinds of wood, furniture, paint and other decorative materials. According to national/national mandatory/regulatory standards, formaldehyde emission per cubic meter of indoor air shall not be greater than 0.08 mg after closing doors and windows for 1 hour; If it reaches 0.1-2.0 mg, 50% of normal people can smell odor; When it reaches 2.0-5.0 mg, the eyes and trachea will be strongly stimulated, and there will be sneezing, coughing and other symptoms; Reach more than 10 mg, dyspnea; If it reaches more than 50 mg, it will cause critical diseases such as pneumonia, and even cause/death. Therefore, the gold standard test next introduces how to detect formaldehyde after the decoration of the new house

I Find a professional testing institution:

there are many institutions and companies that detect formaldehyde now. The opinions on the network are different. Everyone is asking which is more professional and formal? This needs friends to choose carefully. Gold standard testing is recommended here. It is a testing and evaluation institution approved by the state and has CMA qualification

II How to detect formaldehyde after decoration

1 Formaldehyde detection box:

it is easy and fast to operate, and the lower limit of sensitive detection is low. It can be operated on site, so many people choose to use it, but although it is convenient, the detection effect is not ideal, and the error is very large

2. Electrochemical analysis method:

is a quantitative analysis method to judge the concentration of analytes in the reaction system based on the changes of current (volt ampere method), electric quantity (Coulomb method) and potential (potential method) generated in the chemical reaction. There are two methods for formaldehyde detection: polarography and potential method

3. Spectrophotometry:

is a qualitative and quantitative analysis method based on the selective absorption of electromagnetic radiation by substances with different molecular structures. It is the most conventional method for the detection of formaldehyde in homes, textiles and food

4. Chromatography:

has strong separation efficiency, is not easy to be disturbed by the sample matrix and reagent color, and is sensitive and accurate for the detection of complex samples. It can be directly used for the analysis and detection of formaldehyde in homes, textiles and food

precautions

do not move in immediately after the decoration of the new house. Open the window for ventilation for a period of time to slowly volatilize formaldehyde and other harmful substances in the house, and then move in. It's best to put it aside for a summer. The temperature in summer is higher, and the volatilization is faster and better

the above experience is for reference only. If you need to solve specific problems (especially in legal, medical and other fields), it is recommended that you consult professionals in relevant fields in detail

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