Method for removing obstructive elements in noble gas isotope analysis

Keyword
Gettering agent in vacuum, halogen removal, sulfide removal, noble gas purification
Information no
0467S
Appeal point
It enables us to extract gas from hot water, seawater, hot spring water, environmental water, etc. and remove water vapor
It enables us to remove active gases (especially halogens and sulfides) from the extracted gas in low ~ medium vacuum
By performing rare gas purification in high ~ ultra-high vacuum, it is possible to make a preprocessing to separate the noble gas into each element.
Summary
Noble gas isotope analysis in rocks, water, and gas is effective for clarifying past events that occurred not only inside the earth but also inside celestial bodies such as planets. In order to investigate them accurately, it is necessary to remove active gases, water vapor, hydrocarbons, etc., which are their main components.
The present invention relates to an analytical preprocessing device and an analytical preprocessing method to remove those main components. This preprocessing is necessary to analyze a sample containing a noble gas in the environment (for example, seafloor hot spring water). This is a proposal of a preprocessing method.
This preprocessing device and preprocessing method provides the following procedures. Two types of gettering materials are mixed and heated in a preprocessing device, which efficiently remove halides and sulfur compounds via physical absorption while suppressing loss of noble gas. After that, a trace amount of noble gas is purified using a Ti-Zr foil mixture getter.
This technology enables us to reliably remove the disturbing factors of noble gas isotope analysis for environmental water samples (seafloor hot water, sea water, hot spring water, etc.), which is necessary to perform accurate noble gas isotope analysis.
Schematic image
Application
Removal of active gas components (halogen, sulfide, etc.) in the extraction of dissolved noble gases contained in hot water, seawater, hot spring water, environmental water, contaminated water, etc.
Relational patent
Item name
:
Preprocessing apparatus and method for gas analysis
Filing date
:
2015-12-01
Inventor(s)
Keiko Sato
Hidenori Kumagai