Abstract: An analytical vessel for analyzing trace elements, which is formed of glassy carbon produced through carbonization of a resin composition. A method of analyzing trace elements, which comprises the steps of introducing a solution which is capable of decomposing an assay sample into an analytical vessel containing the assay sample and made of glassy carbon produced through carbonization of a resin composition to thereby dissolve the assay sample, thus obtaining a sample solution; and measuring trace elements included in the assay sample and dissolved in the sample solution.

Abstract: Disclosed is a method of recovering lithium from a battery containing lithium such as a lithium ion secondary battery. The lithium-containing member of the battery is dissolved with an acidic liquid, and an alkaline material is added to the obtained lithium solution to transform a transition metal which may be dissolved in the lithium solution into a metal hydroxide precipitation, whereby the metal hydroxide precipitate is separated from the lithium solution. The lithium solution is then dried to obtain a solid containing the lithium, and the lithium is eluted from the solid with a non-aqueous solvent. Retrieving lithium from the lithium eluate is accomplished by use of a cation exchanger.