What is the indoor formaldehyde detection standard?
0. 1mg/m？ Or 0.08mg/m? China has two clear hard and fast standards.
1.？ According to GB/T 18883-2022, the maximum allowable concentration of formaldehyde in indoor air is 0.08mg/m? . (From February 2023 1, the formaldehyde content shall not exceed 0. 1 mg/m3 before February 2023/) 2.
2.？ GB50325-2020 standard, the standard is less than or equal to 0.07mg/m? . The formaldehyde value of first-class civil buildings should be lower than 0.07mg/m? The formaldehyde value of secondary civil buildings should be lower than 0.08mg/m? .
Formaldehyde is a colorless, irritating and harmful gas. Excessive inhalation will damage our health, and the consequences are unimaginable. There are countless cases of cancer caused by excessive formaldehyde every year. For the health of the elderly and children at home, the newly renovated house must be tested for formaldehyde first, and then treated according to the degree of pollution.
How to detect formaldehyde at home?
1.？ Formaldehyde detection box
The formaldehyde detection box can be purchased online, and the formaldehyde detection box is relatively cheap and easy to operate. However, the formaldehyde detection box also has shortcomings, which will be inaccurate because of the influence of the detection environment and can only be used as a reference.
2.？ Formaldehyde detector
The price of formaldehyde detector is higher than that of formaldehyde detection box, and the operation of formaldehyde detector is more complicated, which will be affected by the detection environment like formaldehyde detection box.
3.？ Testing institutions with CMA qualification
Looking for a CMA-qualified testing organization to test, the results are more accurate, you can issue a test report, and there are legitimate interests.
4.？ Professional formaldehyde detection governance company
Professional formaldehyde detection personnel can be invited to conduct on-site detection, and the detection results of formaldehyde detection and management companies and CMA detection institutions are similar. Only the report issued has no legal benefit, but the test data is also relatively accurate. All use professional testing instruments and methods. If the formaldehyde exceeds the standard, you can also ask them to deal with it.
How do professional formaldehyde detection companies detect formaldehyde?
Generally, spectrophotometry and gas chromatography are used for detection.
Spectrophotometry: The professionals of formaldehyde detection company first sampled the air at the scene, and then sent the samples to the laboratory for analysis, and the measured data were accurate.
Gas chromatography: the mixture is separated and analyzed by the adsorption, solubility and affinity of substances, and determined by gas chromatography if conditions permit. If some substances are unstable or difficult to gasify, chemical derivatization method can be used for analysis with high accuracy, but the detection process is complex and time-consuming.
What should I pay attention to before testing formaldehyde?
Before testing, it should be noted that all the furniture in the house must be on site, and then formaldehyde testing is carried out after confirming that all the furniture is there. The concentration of formaldehyde in the home is the concentration measured after all formaldehyde-containing items are released simultaneously. The furniture we bought for decoration also contains formaldehyde, and the formaldehyde inside the furniture will also be released. Therefore, it is necessary to wait until all the hard clothes and soft clothes are ready and all the furniture is available before testing formaldehyde, so that the test results are more accurate.
The above are the national formaldehyde standards, formaldehyde detection methods and precautions.