METHOD OF ANALYSIS WITH GAS CHROMATOGRAPH THROUGH LARGE-AMOUNT INJECTION THEREINTO AND APPARATUS THEREFOR

摘要

To inject a large amount of a sample into a gas chromatograph and use a high-boiling solvent in analyzing organic chemicals was thought to be effective in heightening the precision of the analysis. Provided are an analytical method and apparatus which make such technique practicable. In the analytical method and apparatus, even when a sample containing a high-boiling solvent is injected in a large amount, the sample is temporarily stored in a liquid state in a storage chamber inside a vaporization chamber. The sample is heated for vaporization, and the sample vapor thus generated is introduced into a precolumn together with a carrier gas. Simultaneously therewith, substances other than those to be analyzed, such as the solvent ingredient, are discharged through a solvent discharge passage disposed downstream from the precolumn. Thus, the low-boiling substances to be analyzed are held in the precolumn and not discharged together with the solvent ingredient. Stable analysis can hence be made with higher accuracy.