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Why do formaldehyde test values occasionally differ?

Update Date: 17-05-05 18:20 Views: 145
 
When we carry out formaldehyde self-test or ask a third-party organization to carry out the test, the occasionally obtained values will be different. What is the reason for this?
 
Reason one: environment
The first reason for the difference of formaldehyde detection value is usually caused by the change of indoor environment, because the detection equipment and test paper are usually very sensitive, and the indoor air flow change, personnel walking, indoor gas difference and closing time are usually different, so the test data will be different. For example, if someone has drunk alcohol or smoked in the room during the detection, it will lead to the error of formaldehyde detection. On the one hand, alcohol molecules and harmful molecular components in smoke will change the formaldehyde content of indoor air per unit volume. The other reason is that some formaldehyde detectors are even sensitive to alcohol. You can test it and exhale alcohol gas to some formaldehyde detectors The test data of the tester will change.
 
Reason two: equipment
Different accuracy of equipment is the second reason for the change of formaldehyde detection value. The sensors used by various detectors are different. Some low-quality sensors will obviously affect the test results. If the values given by two different brands of detectors are different, it is very likely that the quality of the superior devices is different.
 
Reason 3: climate
Air temperature and humidity can seriously change the indoor formaldehyde emission. Usually, the hot and humid weather will lead to formaldehyde emission aggravation. In summer, the indoor formaldehyde emission is generally 20% - 30% higher than that in autumn and winter. Specific to a day, different temperature and humidity changes will also lead to different formaldehyde emissions.
 
 
Reason 4: reagents
Most of the formaldehyde detectors use chemical reagents, some of the reagent detectors used many times will change the sensitivity of the detector with the change of time, such as household detector. However, some large-scale detectors use disposable reagent bottles. Obviously, the content of reagents in the reagent bottles will also have a certain impact on the detection results.
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