Personnel using this document should have practical experience in regular laboratory work and should be aware that this document does not cover all possible safety issues. It is the responsibility of the user to take appropriate safety and health measures and ensure compliance with the conditions stipulated in the relevant national regulations. The document describes the method for the determination of the content of nine metal elements in surfactants and detergents, which is applicable to the determination of metal elements in various types of such products. The document refers to a series of normative documents, which specify the necessary terms and definitions. Among them, the definitions and principles of surfactants and detergents are also explained in detail.