METHOD AND DEVICE FOR PERFORMING RAPID ISOTOPE ANALYSIS BY LASER SPECTROSCOPY

摘要

PROBLEM TO BE SOLVED: To measure the composition of isotopes in a specimen in real time.;SOLUTION: A method for measuring the composition of isotopes in a fluid in a geological layer includes steps for: (a) introducing a reference fluid having a known isotope composition into a reference cell; (b) acquiring the specimen of the geological layer; (c) preparing at least one laser beam; (d) scaling at least one parameter of the reference cell; (e) causing a beam to pass through the reference fluid to measure the reference measuring beam before and after passing through the reference fluid; and (f) causing a beam to pass through the specimen to measure the beam before and after passing through the specimen to calculate a first isotope concentration from measured values thus acquired. From the measured values, information is acquired as to carbon isotope compositions of individual compounds in a gaseous hydrocarbon mixture. Methane, ethane, propane, isobutane or n-butane, isopentane or n-pentane, etc. can be listed as compounds of this kind.;COPYRIGHT: (C)2005,JPO&NCIPI