| 摘要 |
PURPOSE:To introduce an extremely small amount of a sample into a higher-harmonic inductive coupling plasma analyzing device (ICP) by using a graphite tube heating furnace as the microsample introducing device. CONSTITUTION:A graphite tube 2 into which an extremely small amount of the sample is injected is powered on through graphite sleeves 1a and 1b at both ends to heat itself. Vaporized sample gas is admitted from a carrier gas port 8 and pressed out of a sample injection hole 2a almost in the center of the graphite tube to the gap between the graphite tube and graphite sleeve 1a by an inert gas sent in from both ends of the graphite tube 2. Then, the gap is further sent out to a chamber 6 from the gap through a takeout hole 1f, an injection hole 1d, etc., bored in the graphite tube 1a and sent to the torch 10 of the ICP through its internal passage 6a. |
