| 摘要 |
PURPOSE:To analyze depth-directional variation of composition speedily with high accuracy up to a deep point without discrimination between a principle component and a fine-amount component by dissolving a sample in a fresh solvent inward from its surface and taking the solvent out with time. CONSTITUTION:When the sample 6 is dipped in the solvent 4 in a dissolving tank 2 for a certain time so that a surface to be analyzed contacts the solvent 4, the sample 6 begins to be solved out from the surface and a solution of components of the surface layer of the sample 6 up to certain depth is obtained. Then, a valve 8 is opened to take the solution out and a fresh solvent 4 is supplied to the dissolving tank 2 from a solvent tank 10; and the sample 6 is dipped again for the certain time, and then a solution of the sample 6 by certain depth from the surface exposed by said dissolution is produced. Thus, solvents 4 are changed at proper intervals of time to obtain solutions of the sample of every certain thickness in the depth direction. Those solutions are analyzed by a liquid sample analyzing device to know the depth-directional variation of the chemical composition.
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