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Continuous shipboard sampling system for determination of triple oxygen isotopes and O 2 /Ar ratio by dual‐inlet mass spectrometry
Author(s) -
Sarma V. V. S. S.,
Abe O.,
Yoshida N.,
Saino T.
Publication year - 2006
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.2756
Subject(s) - chemistry , fractionation , analytical chemistry (journal) , isotope ratio mass spectrometry , mass spectrometry , oxygen , isotopes of oxygen , argon , chromatography , volumetric flow rate , nuclear chemistry , organic chemistry , physics , quantum mechanics
A continuous shipboard sampling system was developed for the determination of the isotopic composition of the triple oxygen isotopes and oxygen to argon (O 2 /Ar) ratios in dissolved air. In this system, dissolved air is separated by a hollow fiber membrane degassing module. This system collects dissolved air quantitatively and rapidly. The sample flow rate through the membrane is critical for the fractionation of the oxygen isotopes and the O 2 /Ar ratio and should be <2 mL/min. Fractionation of oxygen between the liquid and gas phase of the air‐saturated water was found to be similar to that of earlier reports. The advantages of this method over existing techniques include rapid collection of samples (30 min/sample), high efficiency in extraction of gases from the liquid phase, and the lack of a sample preparation step (e.g. degassing). Copyright © 2006 John Wiley & Sons, Ltd.