Jin Bok Lee

TL;DR: In this article, the isotopic abundances of atmospheric Ar were determined using a dynamically operated isotope ratio mass spectrometer with minor modifications and special gas handling techniques to avoid fractionation.

TL;DR: The first key comparison on carbon dioxide in nitrogen dates from 1993-1994 (CCQM-K1.b). Since then, numerous national metrology institutes (NMIs) have been setting up facilities for gas analysis, and have developed claims for their Calibration and Measurement Capabilities (CMCs) for these type mixtures.

TL;DR: This work has newly developed a direct analytical method, characterized by introduction of an arsine gas sample into stable plasma stream, followed by gas-phase oxidation ofArsine with molecular oxygen in a dynamic reaction cell equipped within the inductively coupled plasma-mass spectrometry (ICP/MS) system.

TL;DR: In this paper, the reproducibility of the NDIR measurement is 0.17 ± 0.01 μmol/mol, which is in excellent agreement with the theoretically predicted value of 0.06 µm/mol with a 95% confidence level, and the data are consistent within uncertainty (calibration line was obtained by the best secondary polynomial least squares fit).

TL;DR: The CCQM-K53 key comparison as mentioned in this paper was conducted by the CIPM Mutual Recognition Arrangement (MRA) for the preparation of primary standard gas mixtures in most national metrology institutes.