| 摘要 |
The present invention concerns a process and equipment for drawing off a sample for a chromatographic analysis installation. In addition to the chromatographic analysis apparatus 22 per se and a set of rotary pneumatic valves to which it is normally associated, an additional rotary pneumatic valve is connected as follows: an inlet pipe of the gaseous stream to be analyzed; two pipes connecting this valve to the first valve of the above-mentioned set of and; an open-to-air pipe that is associated to means of injecting water vapor and/or drying gas, at counter-current to the flow direction of the open-to-air stream.
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