| 摘要 |
Provided is an electron capture detector capable of highly sensitive analysis even of sample gas containing a trace amount of a component to be measured. The outer diameter of a column outlet (31) side end portion of a collector electrode (2) in a cell chamber (11) is made to be larger than the outer diameters of other portions of the collector electrode (2). As a result, even sample gas containing a trace amount of a component to be measured can be analyzed with a high degree of sensitivity. An effect such as this cannot be achieved even if the outer diameters of portions of the collector electrode (2) other than the column outlet (31) side end portion are enlarged. Such enlargement only results in increased production costs. Therefore, increasing only the outer diameter of the column outlet (31) side end portion makes it possible to inexpensively enhance sensitivity for sample gas having a trace amount of a component to be measured. |
