This method is a qualitative and quantitative gap method based on the absorption of electromagnetic radiation by molecular structure and molecules with different structures. It is a routine detection method for the three major formaldehyde pollution problems at present.

Modern spectrophotometry mainly includes acetylacetone method, phenol reagent method, AHMT method, magenta sulfurous acid method, chromotropic acid method, phloroglucinol method, catalytic spectrophotometry and so on. Each method has its own emphasis, advantages and disadvantages.

The extended data sensors mainly include electrochemical sensors, optical sensors and photo-biochemical sensors. Among them, electrochemical sensor has simple structure and low cost, and it is also the mainstream testing method at present. Optical sensors are expensive, bulky and limited in use. But generally speaking, the price of the sensor is higher than other methods to detect formaldehyde content, but it is more intelligent and convenient.

In fact, formaldehyde on the floor alone is difficult to detect. Therefore, it is very important for everyone to pay attention to whether the floor meets the environmental protection standards when purchasing. At present, the floors used for home decoration are generally divided into solid wood floors, composite floors and solid wood composite floors. Among them, the formaldehyde of solid wood floor is less harmful, but there are also problems such as high price, complicated installation process and troublesome maintenance and use. The formaldehyde content of composite floor and solid wood composite floor is relatively high because of the need to use glue in the production and installation process.

Many years ago, the state promulgated and implemented the limit standard of harmful substances in wood-based panels. The floor environmental protection standards are divided into E0 (formaldehyde emission ≤0.5mg/L), E 1 (formaldehyde emission ≤ 1.5mg/L) and E2 (formaldehyde emission ≤5.0mg/L). E0 is a European national environmental protection standard, and E 1 is a national mandatory standard. The former is more demanding than the latter. The doctor pointed out that as long as it meets the national standards and pays attention to the main points in the installation process, it will not cause harm.

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