Using Ea Isolink Irms System For Cnsoh; Introduction - Thermo Scientific EA IsoLink IRMS System Operating Manual

Using EA IsoLink IRMS System for CNSOH

This chapter provides instruction for using the EA IsoLink IRMS System for CNSOH.

Introduction

The EA IsoLink IRMS System for CNSOH is an enhanced elemental analyzer for O and H as well as
N, C, and S isotope analyses and element analysis. It is equipped with an automatic switching valve
(ASV) that allows fast switching from NCS analysis (combustion) to the OH analysis (high
temperature conversion/pyrolysis). Isodat Software Suite is able to detect the required analysis mode by
the gas configuration defined in the method, and automatically switches the carrier gas from one mode
to the other. The system can be set up to run elements in single, dual or even triple mode, i.e. one
element per sample, two elements per sample or three elements per sample. The ASV allows to switch
unattended between pyrolysis and combustion so that five elements of a sample can be analyzed from
two sample drops. This chapter covers the setup of dual measurements. Single measurement can be
derived from it. Triple measurements are only recommended with the ramped GC Oven. These
measurements are covered in the Ramped GC Oven Operating Manual.
Contents
• Introduction
• Dual Measurement
• Performing a Jump Calibration
• Creating an Isodat Method for N+C Measurement (Dual Measurement)
• Creating an EA Method for N+C Measurement
• Creating an Isodat Method for Single Mode S Measurements
• High-Temperature Conversion – Analysis of H and O Isotopes
• Setting Up a HO Method
• Creating an Isodat Method for Single Mode S Measurements
• H3-Factor Determination
• Measuring Sulfur Isotopes
• Before Starting a Sulfur Measurement
• Create a Gas Configuration for a Sulfur Measurement
• Starting a Sulfur Measurement
Thermo Scientific EA IsoLink IRMS System for CNSOH Operating Manual
6
83