How much does formaldehyde testing cost?
The cost of formaldehyde testing will vary depending on a number of factors, but it usually ranges from 250 to 500 yuan. Specific**Depends on the testing organization, the content of the service, the location and complexity of the test, etc.
If the formaldehyde concentration is low, the cost of testing may be relatively low. If the formaldehyde concentration is high, or if more complex testing is required, the cost may increase accordingly.
In addition, the formaldehyde testing fees stipulated by different formaldehyde removal companies are also different, and most of the charging standards will be around 30 yuan to 500 yuan.
Formaldehyde detection methods in Beijing mainly include AHMT spectrophotometry, phenol reagent spectrophotometry, meteorological chromatography, acetylacetone spectrophotometry, etc. These methods are carried out according to national standards and can accurately detect the concentration of formaldehyde in the room.
Among them, AHMT spectrophotometry and phenol reagent spectrophotometry are the most commonly used detection methods. AHMT spectrophotometry reacts with the absorbent liquid through formaldehyde in the air, and then oxidizes potassium periodate to form a red compound, and the formaldehyde concentration is quantitatively detected by colorimetry. The phenol reagent spectrophotometry uses the phenol reagent to react with formaldehyde in the air to form azine, which is oxidized by iron ions in an acidic solution to form blue-green compounds, and the formaldehyde concentration is quantitatively detected by colorimetry.
In addition, meteorological chromatography is also a method for detecting formaldehyde. In this method, formaldehyde in the air was generated on a support coated with 2,4-dinitrobenzene 6201 under acidic conditions to generate a stable formaldehyde trace, which was eluted with carbon disulfide and determined by a hydrogen flame ionization detector to qualitatively retain time and quantify peak height.