Analytical Sciences

Abstract − Analytical Sciences, 23(12), 1447 (2007).

A Fast, Simple Calibration Method for Organic Carbon Isotope Analysis Using Continuous-flow Elemental Analyzer Interfaced with an Isotope Ratio Mass Spectrometer
Yeon-Sik BONG and Kwang-Sik LEE
Division of Isotope Geoscience, Korea Basic Science Institute, 52 Eoeun-dong, Yusung-gu, Daejeon 305-333, Korea
Continuous flow analysis using an elemental analyzer interfaced with an isotope ratio mass spectrometer (EA-IRMS) is faster and requires much less material than conventional analytical methods. Although using an EA-IRMS is simple and fast, accurate calibration strongly depends on matching sample and reference peak heights by adjusting the sample weight. This paper describes a new modification for calibration using only the major ion beam intensity (nA) without weighing each sample or increasing the number of reference materials.