燃烧器，是使燃料和空气以一定方式喷出混合燃烧的装置统称。燃烧器按类型和应用领域分工业燃烧器、燃烧机、民用燃烧器、特种燃烧器几种。多用不锈钢或金属钛等耐腐蚀，耐高温的材料制成。燃烧器的作用是通过火焰燃烧使试样原子化。被雾化的试液进入燃烧器，在火焰温度和火焰气氛作用下，经过干燥、熔融、蒸发、离解等过程，产生大量的基态原子，以及部分激发态原子、离子和分子。一个设计良好的燃烧器应具有原子化效率高、噪声小、火焰稳定的性能，以保证有较高的吸收灵敏度和测定精密度。原子吸收光谱分析中常用缝隙燃烧器产生原子蒸气。根据所用燃气和助燃气的种类不同，燃烧器缝隙的长度，宽度各有不同，一般燃烧器上都标注有适用的燃气和助燃气。

Burner is a device that makes fuel and air emit mixed combustion in a certain way. Burners can be divided into industrial burners, burners, civil burners and special burners according to their types and application fields. It is made of corrosion resistant and high temperature resistant materials such as stainless steel or metal titanium. The function of burner is to atomize the sample by flame combustion. The atomized test liquid enters the burner. Under the action of flame temperature and flame atmosphere, a large number of ground state atoms, as well as some excited state atoms, ions and molecules are produced through drying, melting, evaporation and dissociation. A well-designed burner should have high atomization efficiency, low noise and flame stability to ensure high absorption sensitivity and measurement precision. Atomic vapor is produced by slot burner in atomic absorption spectrometry. According to the different types of gas and fuel gas used, the length and width of the burner gap are different. Generally, the suitable fuel gas and fuel gas are marked on the burner.