| 摘要 |
PROBLEM TO BE SOLVED: To detect organic stains on the surface of even a minute solid sample and to measure the stains on the surfaces of a large number of solid samples at one measurement. SOLUTION: Lead particles 1 are mixed with silica beads 3 in a mixing container 5 to have organic stains adhered to the lead particles 1 adhered to the silica beads 3. Then the lead particles 1 are separated from the silica beads 3 by a sieve 9, and the silica beads 3 are placed in a combustion boat 13 and introduced into an oxidizing reaction tube 19. Organic matter adhered to the silica beads 3 is oxidized by the heat of a heating furnace 21 to generate organic gas. The organic gas is transferred to an oxidation catalyst 17 together with a carrier gas, converted into carbon dioxide, and transferred to a NDIR 37 via a cooling tube 31 and an electronic cooler 35 to determine the concentration of carbon dioxide by a signal processing part 39.
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