Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) Compound specific stable chlorine isotopic analysis of volatile aliphatic compounds using gas chromatography hyphenated with multiple collector inductively coupled plasma mass spectrometry
Autor Horst, A.; Renpenning, J.; Richnow, H.-H.; Gehre, M.;
Journal / Serie Analytical Chemistry
Erscheinungsjahr 2017
Department ISOBIO;
Band/Volume 89
Heft 17
Sprache englisch;
POF III (gesamt) T41;
Supplements https://pubs.acs.org/doi/suppl/10.1021/acs.analchem.7b01875/suppl_file/ac7b01875_si_001.pdf
UFZ Querschnittsthemen RU3;
Abstract Stable chlorine isotope analysis is increasingly used to characterize sources, transformation pathways, and sinks of organic aliphatic compounds, many of them being priority pollutants in groundwater and the atmosphere. A wider use of chlorine isotopes in environmental studies is still inhibited by limitations of the different analytical techniques such as high sample needs, offline preparation, confinement to few compounds and mediocre precision, respectively. Here we present a method for the δ37Cl determination in volatile aliphatic compounds using gas chromatography coupled with multiple-collector inductively coupled plasma mass spectrometry (GC-MC-ICPMS), which overcomes these limitations. The method was evaluated by using a suite of five previously offline characterized in-house standards and eight chlorinated methanes, ethanes, and ethenes. Other than in previous approaches using ICP methods for chlorine isotopes, isobaric interference of the 36ArH dimer with 37Cl was minimized by employing dry plasma conditions. Samples containing 2–3 nmol Cl injected on-column were sufficient to achieve a precision (σ) of 0.1 mUr (1 milliurey = 0.001 = 1‰) or better. Long-term reproducibility and accuracy was always better than 0.3 mUr if organics were analyzed in compound mixtures. Standardization is carried out by using a two-point calibration approach. Drift, even though very small in this study, is corrected by referencing versus an internal standard. The presented method offers a direct, universal, and compound-specific procedure to measure the δ37Cl of a wide array of organic compounds overcoming limitations of previous techniques with the benefits of high sensitivity and accuracy comparable to the best existing approaches.
ID 19265
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=19265
Horst, A., Renpenning, J., Richnow, H.-H., Gehre, M. (2017):
Compound specific stable chlorine isotopic analysis of volatile aliphatic compounds using gas chromatography hyphenated with multiple collector inductively coupled plasma mass spectrometry
Anal. Chem. 89 (17), 9131 - 3138