Formaldehyde is mainly used in the artificial climate box in the determination of formaldehyde emission standard, which is specific method of large chamber method, which covers the air exchange rate, release rate, loading rate, test principle is very simple, rate control in a certain value of the formaldehyde climate box in temperature, relative humidity, air velocity and the air replacement, placing known surface area of the sample box regularly from formaldehyde and air mixed gas, from the gas by absorption bottle filled with absorption liquid, formaldehyde content in liquid absorption was determined by Chromotropic acid method or other equivalent method.

Formaldehyde climate box, including gas sampling system, spectrophotometer, balance, etc., for the test operation, the company will send someone responsible for training, until qualified.