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How to use formaldehyde self-test box for formaldehyde detection

Update Date: 15:02, April 25, 2017 Views: 122
 
In the process of using formaldehyde detection box, please read the manual and use it.
Close the doors and windows for 1 hour before the test, and after the absorption box is placed for 30 minutes (40 minutes is recommended in winter), add the chromogenic agent in the transparent vial and cover the box cover. After 10 minutes of standing, compare the data with the colorimetric card to read the data, so that the results can be accurate.
In the actual operation process, the following six points should be paid attention to:
(1) too long or too short sealing time before detection will lead to inaccurate results.
(2) when opening the absorption box, gently cut the tin foil with a knife and open it carefully to avoid spilling powdery reagent in the box.
(3) after the absorbent is poured into the brown bottle, it is not easy to shake the absorption box, so as to avoid leakage or impurities, which will affect the test results; cover the box and gently rotate the absorption box for 2-3 minutes to fully melt the absorbent.
(4) after adding the developer, keep away from the direct sunlight, such as windowsill, etc., because the sunlight will cause the test solution to turn blue and form serious deviation, resulting in inaccurate test results;
(5) add the developer, cover and wait for 10 minutes, and then compare the reading with the colorimetric card in time to determine the test result. It will be inaccurate after more than 15 minutes;
(6) the room temperature should be above 23 ℃ when the temperature is too low, so the indoor formaldehyde concentration can not be accurately displayed.
In the process of using formaldehyde detection box, please read the manual and use it.

Open the absorption box
Pour the white bottle reagent into the absorption box

 
Cover the absorption cap and gently shake the absorption box until the dissolved substance is completely dissolved. Then open the absorption box to prevent the contamination of other substances in the inspected space, which may cause inaccurate test. Pay attention to the test box 80-150 cm above the ground
After 30 minutes, completely pour the brown reagent into the absorption box, shake it gently, cover the box and let it stand for 10 minutes
Compare with the color card, read out the formaldehyde concentration value of each cubic meter of air in the measured space

 
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