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The method of formaldehyde content detection for floor display rack paint

The method of formaldehyde content detection for floor display rack paint

The wooden floor racks just produced will have a certain amount of formaldehyde. From a professional point of view, there are four methods for identifying formaldehyde content.

Display rack paint formaldehyde detection spectrophotometry, this method is based on the molecular structure, according to the different structure of the molecular absorption of electromagnetic radiation and establish a qualitative and quantitative gap method, is the most important three kinds of formaldehyde pollution problem The routine testing method. Modern spectrophotometric methods mainly include acetylacetone method, phenol reagent method, AHMT method, magenta-sulfurous acid, chromotropic acid method, phloroglucinol method, catalytic spectrophotometry, etc. Each method has its own emphasis, each has advantages and disadvantages. Sex.



Display rack paint formaldehyde detection method Electrochemical, electrochemical method is based on the changes in current, electricity, potential generated by the chemical reaction, determine the concentration of the analyte and a quantitative analysis of a method. Current electrochemical methods for detecting formaldehyde are mainly polarographic and potentiometric.

Display paint formaldehyde detection method chromatography, chromatography is a special test method for food, homes and textiles, flexible and adaptable. It can be directly used for the analysis and detection of formaldehyde in residential rooms, textiles and foods. The formaldehyde in the sample can also be derivatized and then measured. However, chromatographic procedures are cumbersome and are generally used when large amounts of formaldehyde are detected.

Display rack paint formaldehyde detection method sensors, the sensors here are mainly electrochemical sensors, optical sensors and optical biochemical sensors. Among them, the electrochemical sensor has a simple structure, low cost, and short use time. Optical sensors are expensive, bulky, and use more restrictive. But in general, the price of sensors is much higher than other methods of detecting formaldehyde, and it is difficult to have their market in the market.

The above is a method for testing the formaldehyde content of a professional wood flooring display rack. In fact, if you do not need precision to detect formaldehyde content, you only need to confirm whether it exceeds the standard. With enough experience in our own daily life. Formaldehyde is a colorless gas with a special irritating odor. It has irritating effects on human eyes and nose, gas relative density of 1.067 (air = 1), and liquid density of 0.815g/cm3 (-20°C). So the most common thing is to use our big nose to smell. If the rack smells a certain stimulating odor, it proves that the formaldehyde has not completely dissipated and has certain toxicity.

Common and effective methods for removing formaldehyde:

Activated carbon: high concentrations of formaldehyde encountered activated carbon will be absorbed by the internal voids of activated carbon. Reduce the concentration of formaldehyde inside the exhibition hall.

Water absorption method: Formaldehyde is soluble in water. Putting a few pots of fresh well water or tap water in the exhibition hall has a good adsorption effect.

High temperature baking: high temperature baking can even accelerate the decomposition of formaldehyde, but this method is not recommended for indoor showrooms. The best choice when working outdoors in the wind.

Finally, because the density of formaldehyde gas is a little heavier than air. So it is easier to settle in the middle and lower floors of the room. There are wooden floor building materials owners with children in the store should reduce the number of children to the store's showroom.
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Jul-29-2019