METHOD AND DEVICE FOR ANALYSIS OF DIFFUSED HYDROGEN IN METAL SAMPLE

摘要

PURPOSE:To make possible to analyze hydrogen accurately in a short time with high sensitivity in a simple operation without using chemicals by catching carbon dioxide gas used for substitution in a vessel by cooling a part of a conduit, and then analyzing hydrogen with a mass spectrometer. CONSTITUTION:Blowing in carbon dioxide gas from a valve 7 into a vacuum vessel 1 for metal sample, a sample feed port 2 is opened to substitute the inside of the vessel with carbon dioxide gas. Next, a metal sample 4 which has previously been treated, for example, by electrolytic hydrogen charging is set on a supporting base 3 from the feed port 2, and the feed port 2 and the valve 7 are closed immediately. On the other hand, a part from a needle valve 9 to a mass spectrometer 13 is made vacuum beforehand, so that measurement can be carried out. Next, by adjusting the needle valve 9, setting a cooling conduit 10 in a cooling device 11, filling liquid nitrogen and opening a valve 8, the carbon dioxide in the vessel 1 is cooled and caught, and then diffused hydrogen in the metal sample is introduced into the mass spectrometer 13 and analyzed continuously.