Is it accurate to detect formaldehyde in winter? Is formaldehyde detected accurately?

When formaldehyde is tested, the formaldehyde concentration in the indoor air is measured. Indoor formaldehyde is mainly released from the decomposition of urea-formaldehyde resin glue in wood-based panels, which is extremely unstable and will decompose and release formaldehyde when exposed to moisture and heat.

According to the chemical principle, the boiling point of formaldehyde is -19 degrees, in the case of -19 degrees, although formaldehyde will become gaseous, but it can only exist in the plate, and there is not enough energy to be free into the indoor air, when the room temperature is about 19 degrees, formaldehyde can obtain enough energy to be free outside the plate and released into the air. Therefore, in winter, we may not exceed the standard of formaldehyde, but the test results in summer are often quite different from those in winter.

In fact, no matter when formaldehyde is detected, the test result is the concentration value of indoor formaldehyde, the formaldehyde emission is low in winter, so the formaldehyde concentration in the indoor air is also low, and the formaldehyde emission is high in summer, so the indoor formaldehyde concentration is also high. From this point of view, no matter when formaldehyde is detected, the test results are actually accurate.

In the four seasons of the year, summer is the season with the highest indoor formaldehyde concentration, and if the formaldehyde detection in summer does not exceed the standard, it is generally possible to move in healthily and safely.

Precautions for measuring formaldehyde in winter: the boiling point of formaldehyde is -19 (minus 19 degrees Celsius), almost non-volatile below 10, and the formaldehyde release rate accelerates with the increase of temperature and humidity. In winter, when detecting formaldehyde in indoor air, it is recommended that the room temperature should be above 20 (taking Shenzhen, Guangzhou and other southern coastal cities as an example, the normal temperature in the northern region may not reach 20, which can reduce the temperature requirements), or in the case of turning on the air conditioning (heating), it reaches about 25 degrees.

1. Close doors and windows for 8-12 hours.

2. Turn on the air conditioning or heating for 8-12 hours at the same time (the indoor temperature reaches 20°C-26°C).

If the room temperature is too low, it will definitely not be accurate, and it will be kept above 20 degrees Celsius during the test.

Formaldehyde detection can be carried out in winter, but one point is particularly important, due to the low indoor temperature in winter, it is much lower than the room temperature in summer, resulting in a decrease in indoor formaldehyde release, and the formaldehyde detection result will be lower than the summer detection result. Therefore, in winter, it is recommended that you close the doors and windows for 12 hours, turn on the air conditioning, floor heating, heating and other heating equipment to ensure that the indoor temperature is about 25 in winter, as close as possible to the summer environment.

The formaldehyde content test results of commercially available testing instruments are inaccurate; Using the results of formaldehyde tester debugging, it takes multiple tests to get relatively accurate results; And after professional formaldehyde testing.

The results obtained are relatively accurate.

The handheld formaldehyde detectors sold on the market are relatively different, ranging from dozens to thousands, but in fact, the detection results of this kind of formaldehyde detector are very inaccurate. During the test, you only need to change the flow rate of the air around the test instrument, and the value on the instrument table will be changed.

Formaldehyde detection reagents, such words accuracy.

It is relatively high, but it is necessary to purchase different brands and batches of reagents for testing in order to accurately detect whether formaldehyde exceeds the standard. Moreover, the reagents for testing formaldehyde are time-sensitive, and long-term placement will lead to the problem of drug failure of the reagents, and the results will be more accurate after multiple tests.

When professional testing companies test formaldehyde content, they first collect air indoors and send it to the laboratory for testing, and the results of laboratory tests will be more accurate, but it will be more expensive.

Some testing companies will use more professional formaldehyde testing instruments for testing, but the internal parameters of this instrument can be manually adjusted, so the credibility will be reduced.

Formaldehyde detection is also divided into many methods, there are formaldehyde detection boxes, as well as formaldehyde detectors, generally speaking, formaldehyde detection boxes are more convenient, the results may not be as accurate as formaldehyde detectors, but cheap, you can do more tests, once you find that formaldehyde exceeds the standard, it is necessary to treat it in time, the following is an introduction to several methods to remove formaldehyde for your reference.

1. The most common way to remove formaldehyde indoors is to open windows for ventilation, and this method has almost no cost. But the ventilation method also has disadvantages, first of all, the location of the house should be good to achieve the effect of ventilation, and secondly, the formaldehyde in the decoration materials is in a state of continuous release, and it is impossible to completely remove formaldehyde through window ventilation, it can only play an auxiliary role in removing formaldehyde.

2. Activated carbon to remove formaldehyde is the most commonly used way to remove formaldehyde in life, and the cost is low, but activated carbon is prone to adsorption saturation in a short period of time, and it needs to be replaced or dried after saturation. Another point to note is that if the amount of activated carbon is not enough, it will not play much role in removing formaldehyde indoors.

5. The air purifier used to be a high-end product, and the times have developed, and there is a trend of slowly going to the volume, because it is equipped with a fan inside, which can actively adsorb formaldehyde in the corresponding space, but it is recommended to buy products with formaldehyde removal function, and the formaldehyde filter element needs to be replaced regularly when used.

6. The fan can assist in opening the window for ventilation, many houses are not necessarily transparent, and the effect is not very good when the window is opened, so the fan can be used to accelerate the air flow in the room and quickly discharge the free formaldehyde in the air