How to measure formaldehyde after the house is decorated

Where the home is, the heart is at peace.

You can find a special testing agency to measure the formaldehyde content of the space through equipment and instruments, or you can buy an air detection box or instrument to detect. Among them, the detection data of the former will be more accurate, and the treatment plan will be formulated according to the relevant situation, and the latter will judge the formaldehyde concentration by color and value.

How to measure formaldehyde after the house is decorated? 9 methods for detecting formaldehyde in the room.

2018-09-21 293 people 6 pages.

How to measure formaldehyde after the house is decorated9 Methods for Formaldehyde Detection.

Formaldehyde detection methods are mainly divided into two categories: self-detection methods and professional detection methods

1. Self-testing method.

1.Smell the smell:

The newly renovated house generally exceeds the formaldehyde standard, if your house has a very pungent decoration smell, then immediately open the window for ventilation.

2.Formaldehyde test strips:

**Cheap, the measurement accuracy is OK, and it is not very convenient to use.

3.Formaldehyde detector for semiconductor sensors:

**Relatively inexpensive and with low measurement accuracy. At present, there are many semiconductor formaldehyde detectors within 100 yuan, but the characteristics of semiconductor sensors are not good, in our professional words, "only qualitative measurement, not quantitative measurement", and the measurement results are impossible to be accurate. It is precisely because of this that many products require that the formaldehyde content be measured in the house after being turned on and preheated in a place where there is no formaldehyde outdoors, which has the advantage of being able to achieve relative measurement and the effect will be better.

4.Look at the reflection of flora and fauna:

If the small animals in the home are prone to diseases, do not like to eat, their activity decreases, and a large number of plants wilt, it means that the formaldehyde content in the home exceeds the standard.

5.Use the formaldehyde detection box:

Formaldehyde detection box is the most economical and safe detection method, relatively small, and the operation is particularly simple.

Here's how:

Before testing, the test space is sealed for 1 hour, and then the absorption box is opened, and all the white bottle reagents are poured into the absorption box. Close the absorption cap and gently shake the absorption cassette until the internal solution is completely dissolved. Then open the absorbent cassette and prevent it from being in the test space for 30 minutes (80-150 cm from the ground).

After 30 minutes, pour the brown reagent completely into the absorption box, then shake it gently, close the lid and let it stand for 10 minutes. Compare color with the color card and read out the formaldehyde concentration value per cubic meter of air in the measured space.

There are machines that specialize in measuring formaldehyde, and there are some sold on the Internet.

After the decoration of the new house, there will inevitably be various harmful substances caused by decoration in the house, and formaldehyde in the mu bucket is the most concerned by everyone, because formaldehyde has brought great harm to people's health and survival, so how to measure formaldehyde after the house is decorated? Let's take a look.

1. Self-test method.

If the family members find that they are easy to get sick after moving into the new home, or if several people are sick at the same time, then the air pollution in the new house must be serious, then the windows should be opened immediately for ventilation, and the sick family members should be sent to the hospital for treatment. Under normal circumstances, the formaldehyde content of the newly renovated house is exceeded, if there is a very pungent decoration odor in the house, then the formaldehyde content must be exceeded.

2. Look at the animal's reaction.

If your new pet is easy to get sick, doesn't like to eat, has decreased activity, or has a large amount of wilting in the planted plants, then it means that the formaldehyde content in the new home must be exceeded, and you need to find a way to remove formaldehyde.

3. Gas chromatography spectroscopy.

Formaldehyde in the air needs to be adsorbed on a dinitrobenzene-coated support under acidic conditions, resulting in a stable formaldehyde hydrazone. It can be eluted with carbon disulfide, separated by an OV column, and then determined by a hydrogen flame ionization detector to qualitatively retain time, quantify peak height, and measure range: if the flow rate is sampled at 20L, then the measurement range is.

Lower Limit of Detection:.

4. Colorimetry.

Formaldehyde in the air is absorbed by the absorbent solution, and reacts with 4-amino groups in the alkaline solution, and the hazard is oxidized by potassium periodate to form a purple-red compound, and the depth of its color is proportional to the formaldehyde content. Measurement range: If the volume of the sample is 20L, then the concentration range of the Rapid Concealment Mill is reached.

Lower Limit of Detection:.

5. Formaldehyde rapid test strip.

The reaction part at the front end of the test strip is yellow, and when the reaction part of the test strip becomes darker, it means that the concentration of formaldehyde in the room is relatively high; When the yellow color of the reaction part of the test strip becomes lighter, it means that the concentration of indoor formaldehyde is relatively low, and the specific content should refer to the standard colorimetric card, so as to read the general value, so as to determine whether the indoor formaldehyde concentration exceeds the standard or exceeds the general range.

Now there are a lot of decoration materials that contain a lot of formaldehyde, which leads to the inevitable presence of formaldehyde in the decorated house, so it is best to test the formaldehyde content before moving in.