Many people in modern home furnishings will be paved floor, but the floor will release toxic gases, such as formaldehyde, formaldehyde has a special irritating smell, the human eye, nose and other irritating effects, but also on the skin allergies, direct skin contact with formaldehyde can cause allergic dermatitis, discoloration, necrosis, inhalation of high concentrations of formaldehyde can also induce bronchial asthma, the most common reaction is a headache, dizziness, then how to detect formaldehyde floor? Here to introduce it to you, take a look at it.
Electrochemical detection method illustration
1、Spectrophotometric detection method
This method is a qualitative and quantitative seam method established from the molecular structure, according to the absorption of electromagnetic radiation by molecules of different structures, is the current more major three formaldehyde pollution problems of conventional detection methods. Modern spectrophotometric methods are mainly acetylacetone method, phenol reagent method, AHMT method, magenta a sulfite, variegated acid method, m-benzotriol method, catalytic photometric method, etc. Each method has its own focus, each has its own advantages and disadvantages.
2、Electrochemical detection method
Electrochemical method is a method of quantitative analysis from the changes in current, power and potential generated in the chemical reaction, to determine the concentration of analytes. The current detection of formaldehyde electrochemical method mainly has a polarographic method and potentiometric method two.
Shenzhen floor formaldehyde how to detect
3, chromatography detection method
Chromatography is a detection method specifically for food, housing and textiles, flexible and versatile, highly applicable. Can be directly used in the room, textiles, food analysis and detection of formaldehyde. It can also be used for the determination of formaldehyde in the sample after derivatization. However, the operation process of chromatographic method is more cumbersome, and is generally used for large scale testing of formaldehyde content.
Sensor detection method schematic diagram
4、Sensor detection method
Here the sensor is mainly electrochemical sensors, optical sensors and photochemical sensors. Among them, the electrochemical sensor structure is simple, low cost but short duration of use. Optical sensors are expensive, bulky, and more restrictive in use. However, in general, the price of sensors is much higher compared to other methods of detecting the content of formaldehyde, and it is difficult to have them in the market.
In fact, to carry out floor formaldehyde detection alone is a certain degree of difficulty. So it is important for everyone to pay attention to whether it meets the environmental standards when buying flooring. The current home decoration and decoration of the floor is generally divided into solid wood flooring, laminate flooring, solid wood composite flooring three. Among them, solid wood flooring is less harmful to formaldehyde, but also has a high price, installation process is complex and maintenance using the more troublesome problem. And laminate flooring, solid wood laminate flooring due to the production, installation process requires glue, relatively speaking, the formaldehyde content will be higher. Many years ago the state issued and implemented the limit of harmful substances of man-made board standards. Flooring environmental standards are divided into E0 (formaldehyde emission ≤ 0.5mg / L), E1 (formaldehyde emission ≤ 1.5mg / L), E2 (formaldehyde emission ≤ 5.0mg / L), E0 for the European national environmental standards, E1 for the national mandatory standards, the former compared to the latter higher requirements, but in recent years, some domestic enterprises in some products also began to use E0 standards. Doctors pointed out that as long as the national standards are met, pay attention to the main points in the installation process, it will not cause harm.
