HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Heinemeyer, O. Articles by Kaiser, E.-A. Search for Related Content PubMed Articles by Heinemeyer, O. Articles by Kaiser, E.-A. Agricola Articles by Heinemeyer, O. Articles by Kaiser, E.-A.

Automated Gas Injector System for Gas Chromatography: Atmospheric Nitrous Oxide Analysis

Institut für Bodenbiologie, Bundesforschungsanstalt für Landwirtschaft, Bundesallee 50, 38116 Braunschweig, Germany

*Corresponding author (kaiser{at}kepler.dv.fal.de)

ABSTRACT

Improving estimates of the contribution of the terrestrial ecosystems to the global N₂O budget will require high-frequency and large-scale gas flux measurement programs. Such programs are typically best performed by automated sampling systems. We developed a new automated gas injector system for gas chromatography. The system is based on a commercially available liquid sample changer and subambient pressure gas handling. The injector fills a sample loop and measures the exact sample pressure. The autosampler allows the unattended analysis of up to 220 N₂O gas samples contained within 10-mL Vacutainers and an unlimited number of reference samples. A software package was developed to run the analytical system, including a gas chromatograph equipped with an electron capture detector for N₂O analysis. Final results are calculated using the sample pressure and the integrated area data.

Received for publication June 26, 1995.