| 摘要 |
PROBLEM TO BE SOLVED: To provide a multidimensional gas chromatograph apparatus not causing the shift of a retention time due to the changeover of a flow channel. SOLUTION: In a flow channel changing-over part for alternatively supplying the sample gas passed through a first column to a first detector or a second column, the switching gas Gs supplied from a switching gas supply part is branched into two parts in a branching part 93 and one of them is introduced into a three-way valve 84. When the valve 84 is changed over to an A-direction, the switching gas Gs is directly supplied a branching part 92 but, when the valve 84 is changed over to a B-direction, the switching gas Gs is passed through a first resistance pipe 81 and the gas pressure of the branching part 92 is lowered. The other switching gas Gs branched at the branching part 93 is always passed through a third resistance pipe 83 having a resistance value lower than that of the first resistance pipe 81 to be supplied to a branching part 91. COPYRIGHT: (C)2007,JPO&INPIT
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