Burner is a general term for a device that makes fuel and air eject and burn in a certain way. Burners are divided into industrial burners, combustors, civil burners and special burners according to types and application fields. It is mostly made of corrosion-resistant and high temperature resistant materials such as stainless steel or metal titanium.

   The function of the burner is to atomize the sample through flame combustion. The atomized test solution enters the burner. Under the action of flame temperature and flame atmosphere, a large number of ground state atoms, as well as some excited atoms, ions and molecules are produced through the processes of drying, melting, evaporation and dissociation.

   A well-designed burner shall have the performance of high atomization efficiency, low noise and stable flame, so as to ensure high absorption sensitivity and measurement precision. Gap burners are often used to produce atomic vapor in atomic absorption spectrometry. According to the types of gas and auxiliary gas used, the length and width of the burner gap are different. Generally, the applicable gas and auxiliary gas are marked on the burner.

   In the broad concept of burner, domestic water heater, gas stove and even lighter can be regarded as a kind of burner. According to its working principle, the burner can be defined as a kind of equipment that converts substances into heat energy through the chemical reaction of combustion - that is, air and fuel are mixed in an appropriate proportion through the premixing device to make it burn fully.