Classification of formaldehyde concentrations
The classification of indoor formaldehyde can be divided into two categories: standard and simple!
1. Standard tests
The standard tests are those conducted by professional and qualified inspection agencies with a certain legal effect in accordance with the national standards. You can see this as a definition of standard tests. “professional, qualified testing institutions”, which we often call for at least cma-certified testing institutions. Such institutions specialize in the detection of indoor air-chemical concentrations. “cma certification”, which is a certificate of qualification that has been reviewed and approved by the local government's quality technology supervision and inspection board, is sufficient for him to present the certificate when the institution starts testing or at least receives the money. “national standards” are those for indoor hazardous chemicals, for which there are national limits, and for which tests are carried out strictly in accordance with national standards. Finally, the test has some legal force and can serve as a basis for litigation or argument。
What about simple formaldehyde tests?
A simple test is a test of indoor formaldehyde concentration by specialized personnel, or individual consumers, using specific instruments or equipment, against national standards, the results of which, while not standardized, have no legal validity, are of great value in determining the extent of indoor air pollution. In other words, simple testing is the development of standard, complex and time-consuming tests that require specialized expertise, through the development of specific instruments and equipment, into simpler methods and means of detection that are simple, time-consuming and can produce results in the field。
Simple tests are simple to use, but there are certain errors in the results from the standard tests, which are determined by the “specified instruments, equipment” used in the tests. It can be said that the reliability of the values of indoor formaldehyde measured using simple detection methods is crucial to see whether the quality of “instruments, equipment” used for testing is being passed or not。
How to detect formaldehyde
I. Spectrophotometry
Spectrophotometry, a qualitative and quantitative method of analysis based on the selective absorption of electromagnetic radiation by substances of different molecular structures, is the most common method of detection of formaldehyde in rooms, textiles and foodstuffs。
Ii. The arbitral delivery box
This is an easy way of self-testing, which you can normally test with a self-test box before asking a third-party test company to do, and if you find a score that may exceed the standard of formaldehyde, then you can ask a third-party company to do a sophisticated test. In addition, the self-measurement box has a high margin of error and detection data are not accurate and can only be used as a reference。
Iii. Electrochemical analysis
Electrochemical analysis methods are based on changes in current (volamic), power (column) and level (platform) generated by chemical reactions, and determine the concentration of the analytical material in the response system for quantitative analysis. There are two types of spectrum and bit method for formaldehyde detection。
The response of plants and animals
Observes the reaction of animals and plants can also detect formaldehyde to a certain extent, such as the death of plants by atrophy, which happens when they move into new homes. The pets are sick, they don't eat, they're weak, they're less dynamic and they always like to be still. If this happens and your family reacts with a similar low resistance, it is generally certain that your new residence is problematic。
V. Physicochemical methods
The detection of formaldehyde is mostly the use of physico-chemical methods, which are the most sophisticated method, as well as that used by third-party testing companies, and are not generally available. The detection methods include, inter alia, ahmt spectrophotometry, phenol reagent spectrophotometry, gas chromatography electrochemistry, and sensors. If the test is exceeded, it should be administered in a timely manner to avoid greater losses to families。
Vi. Self-testing
It is judged on its own feelings that, for example, the whole family has a collective cold after moving into a new home, low immunity and prone to dizziness. The energy drops out of exhaustion. There is an irritating smell, especially when it comes to tears in the eyes when it comes close to a particular furniture. This is when more sophisticated inspections are conducted as soon as possible and indoor ventilation is maintained。
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