GB/T 7728-1987 is a general rule for flame atomic absorption spectroscopy (AAS) in the chemical analysis of metallurgical products. This standard describes the principle of this analytical method and sets requirements for the performance and component specifications of instruments and equipment such as AtomicAbsorption Spectroscopy. Specify the collection and preparation of samples, including the steps of sample selection, crushing, dissolving, etc. It also covers the analysis operation process, from the preheating and calibrating of instruments, to the determination of wavelength selection, data processing methods, etc. It provides unified guidance for the use of flame atomic absorption spectroscopy (AAS) to detect elemental content in various metallurgical products, ensuring accurate and reliable analysis results.