| 摘要 |
PURPOSE:To prevent thermal cracking due to the excessive rising in temp. or an adsorption phenomenon due to the excessive lowering in temp., by applying program control to the rising in the temps. of an interface, a gaseous specimen introducing pipe and an ionizing chamber in matching relation to the rising in the temp. of a GC column thermostatic tank. CONSTITUTION:In an analytical apparatus consisting of a gas chromatograph and a mass analyser, the temps. of a GC interface 2, a gaseous specimen introducing pipe 4 and an ionizing chamber 5 is raised in synchronous relation to the rising in the temp. of a GC column thermostatic tank 1 by program control. By this method, the temp. raising program from the outlet of the column thermostatic tank 1 to the ionizing chamber 5 can be freely set and, therefore, a situation such that dehydration or demethylation is generated by heat before ionization and the molecular ion on a mass spectrum is not detected is eliminated. The high b.p. compound in a high mass region can be also detected and, because the specimen is not adsorbed, the detection of a minute amount can be performed.
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