| 摘要 |
A sample introduction system that can easily adapt to the growing diversity of analytical conditions without being influenced by the flow rate of gas introduced in an analytical instrument and attains introduction of an analytical sample into the analytical instrument without wasting, thus contributing to convenient, high-precision, high-sensitivity analysis. In the system, pretreating unit (1) removes any unwanted components from untreated sample gas (G1) containing an analytical sample. The treated sample gas (G4) pretreated by the pretreating unit (1) is led through connecting gas flow channel (20) into analytical instrument (30). Gas addition unit (40) for adding of carrier gas (G7) to the treated sample gas (G4) flowing toward the analytical instrument (30) along the connecting gas flow channel (20) has means for changing the addition flow rate of the carrier gas (G7). Upstream of the gas addition unit (40), any pressure fluctuation of the gas containing an analytical sample is regulated by means of pressure regulation unit (50).
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