There are hard standards for indoor formaldehyde detection in China. GB/T 18883-2002 and GB50325-2020 clearly stipulate that spectrophotometry or gas chromatography must be used for formaldehyde detection. It takes two steps to use these two methods: atmospheric sampling and formaldehyde detection. The standard of atmospheric sampling is indoor air sampling, and the sampling specification is 500MPa * 20Min*500ml, that is, sampling 10 liter of air.
Then the sampling results of 10L air were analyzed by spectrophotometry or gas chromatography.
Therefore, if you want to detect formaldehyde in your home, you must professionally detect formaldehyde, which not only meets the national standards, but also has more accurate values, and the cost is even lower than the formaldehyde detector you bought.
In addition, the value after detection is the detailed value of five harmful gases of formaldehyde, which allows you to accurately judge the air pollution situation at home and avoid misjudgment affecting your health.