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A method for the extraction of a specific material from a sample by immersing the sample into an appropriate solution and flushing it. This method is used for chemical analysis of solder residues as well. Besides the direct separation of the sample, it is also possible to make materials easily extractable in advance through certain chemical reactions. The extraction from a liquid is carried out by using an immiscible solvent and a separating funnel. In this method, it is recommended to use a low-boiling solvent such as alcohol, ether, benzene, chloroform, or ethyl.