Tips for self-testing for formaldehyde

If you are planning to renovate your home, the first thing you need to consider is whether the formaldehyde content will exceed the standard. As we all know, many decoration materials nowadays are rich in harmful substances such as formaldehyde. So after the decoration is completed, you must not move in immediately. It is best to learn some methods of self-testing formaldehyde to check whether the formaldehyde in the room exceeds the standard. Sharing with everyone some tips for self-testing for formaldehyde.

Features: convenient and fast operation; low detection limit; can be operated on site.

The formaldehyde self-test kit generally consists of a brown bottle of diluent, a transparent bottle of developer, and a reaction box filled with powder.

Before testing, close the doors and windows of the room to be tested for one hour, pour the diluent into the reaction box and fully dissolve it with the reactants, place the reaction box indoors at a height of 80 to 150 cm from the ground, pour in the color developer after exposure for 30 minutes, tighten the bottle cap and shake well, let it stand for 10 minutes before opening, and compare it with the colorimetric scale card of the self-test box.

Yellow basically does not contain formaldehyde, the yellow-green color is slightly yellowish but not exceeding the standard, the yellow-green color is slightly green but not seriously exceeding the standard, the green color exceeds the standard a little bit, and the blue color exceeds the standard.

Although this method is simple, its accuracy cannot reach 100% and it can only be used as a rough test.

② Electrochemical analysis

Electrochemical analysis is a method of quantitative analysis based on the changes in current (voltammetry), charge (coulometric method), and potential (potentiometric method) generated in chemical reactions to determine the concentration of the analyte in the reaction system. There are two methods used for formaldehyde detection: polarography and potentiometric method.

Spectrophotometry is a qualitative and quantitative analysis method based on the selective absorption of electromagnetic radiation by substances with different molecular structures. It is the most common method for detecting formaldehyde in living rooms, textiles and food.

Chromatography has powerful separation efficiency, is not easily interfered by sample matrix and reagent color, and is sensitive and accurate in detecting complex samples. It can be directly used for the analysis and detection of formaldehyde in living rooms, textiles, and food.

Sensors for formaldehyde detection methods - Sensors used to detect formaldehyde include electrochemical sensors, optical sensors, and photobiochemical sensors.

The household formaldehyde detector uses Weisheng Technology's electrochemical formaldehyde sensor to directly convert the formaldehyde concentration signal in the air into an electrical signal in real time. After data processing by a microcomputer, the measurement results are displayed in LCD digital form.

ZE08-CH2O Formaldehyde Sensor Module

Place the formaldehyde detector in the test environment, or in the same enclosed space as the test objects such as paint, wait for 5 to 10 minutes, and the value on the formaldehyde detector display will show the real-time formaldehyde concentration and will continue to change. The results detected in this way are relatively accurate.

④ Formaldehyde testing agency

Asking a professional formaldehyde testing agency to conduct indoor environment testing is suitable for enterprises, units, and families that are relatively concerned about environmental protection. It is best to entrust a professional agency to conduct an indoor environment test before moving into a newly renovated house.

This type of testing method has the most credible testing results, but it takes a long time and is expensive, and it also cannot fully guarantee the professionalism and formality of the testing agency.

Of course, in addition to the popularization of the several types of formaldehyde detection mentioned above by the editor, there are also common methods that everyone does.

⑥ Granular activated carbon formaldehyde removal method. This method is also suitable for homes that have no odor after decoration, because some harmful substances are colorless and odorless.

⑦ Open windows for ventilation . The ventilation method is to discharge harmful gases to the outside through the flow of air. This is a simple and effective method. The only drawback is that the formaldehyde release cycle is long, generally three to fifteen years.

In summary, there are many methods, but the most fundamental method is to remove formaldehyde at the source, try to ensure that all decoration materials and furniture purchased meet the specifications, and at the same time, on the basis of meeting the specifications, test them again through the methods introduced by the editor above, and the effect will be relatively better.