The formaldehyde self-test box adopts phenol reagent method, and the content of formaldehyde is judged by the reaction color of reagent and indoor air. The determination method is colorimetric card, and the final formaldehyde content value is determined by naked eye judgment.
1. First, close the doors and windows of the room where formaldehyde content needs to be detected for two hours.
2. Then pour all the reagents in the formaldehyde self-test box into the absorption box, cover the absorption cover, and gently shake the absorption box until the contents are completely dissolved.
3. Next, open the absorption box and put it in the inspected space for 30 minutes, paying attention to the position 80- 150 cm away from the ground.
4. Pour the brown reagent into the absorption box completely, then shake it gently, cover the box, and let it stand for 10 minute.
5. Finally, compare the color chart and read the indoor formaldehyde content.
Second, the formaldehyde handheld detector
1. First seal the room where formaldehyde content needs to be detected 1 hour, and wait for formaldehyde to be fully and evenly dispersed in the environment.
2. Then press the start button of the detector and wait for a few seconds.
3. Finally, the detected number will appear on the screen of the detector. The higher the value, the greater the formaldehyde content.
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