| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of concentrating a solute in a solution sample by means of a microwave heating, capable of performing the concentration of the same in of a high concentrating ratio a short time. SOLUTION: When the solution sample 2 held inside a vessel 3 with an open mouth is evapolated by a microwave heating 10 to have its solvent removed, a dielectric substance such as water having a high permittivity is brought into contact with at least a part of the external surface of the vessel to be also heated with the microwave.
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