| 摘要 |
<p>Gas chromatography assembly comprising a high mass, thermally conductive body (15) provided with at least one cell (39) in which is disposed a resistance filament (48) for the detection of a sample gas. Lines (94, 112) are provided for communication between the cell and sample gas and carrier gas from chromatographic separation columns (92). The conductive body is adapted to carry the separation columns in heat transfer relationship therewith. In accordance with the present invention, the assembly components, including the interior of the cell and the separation columns are heated with a single heating element (30), which is controlled by a single heating element control. The temperature of the environment of the sensor, switching valves and the separation columns, are thus controlled through a single constant temperature control system. Each element of the assembly is provided with sufficient surface area at the point where it is joined with an adjacent element of the assembly to define a flame path of sufficient length to prevent the escape of a flame from between the contiguous elements.</p> |
