Document Detail


C2-C8 hydrocarbon measurement and quality control procedures at the Global Atmosphere Watch Observatory Hohenpeissenberg.
MedLine Citation:
PMID:  12058932     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A new automated on-line GC-flame ionization detection system for long-term stationary measurements of atmospheric C2-C8 hydrocarbons in the lower ppt range is described. The system is operated at the Global Atmosphere Watch Observatory Hohenpeissenberg (47 degrees 48'N, 11 degrees 01'E) in rural south Germany. Atmospheric mixing ratios of more than 40 different hydrocarbons can be continuously measured in 80 min time intervals. Corresponding detection limits are below 3 ppt, except for propene, butenes and benzene (about 10 ppt). Detailed quality assurance and quality control protocols are described which are applied to routine operation and data analysis. The various error contributions, overall precision, and accuracy for all measured compounds are discussed in detail. Typical ambient air mixing ratios are in the range of a few ppt to a few ppb, and corresponding measurement accuracies are below 10% or 10 ppt. For less than 20% of the analyzed compounds measurement accuracies are worse, mainly because of insufficient peak separation, blank values or reduced reproducibilities. The present system was tested in international intercomparison experiments (NOMHICE, AMOHA). For most of the C2-C8 hydrocarbons analyzed, our results agreed better than +/- 10% (20% NOMHICE phase 5) or +/- 10 ppt with the corresponding reference values.
Authors:
C Plass-Dülmer; K Michl; R Ruf; H Berresheim
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of chromatography. A     Volume:  953     ISSN:  0021-9673     ISO Abbreviation:  J Chromatogr A     Publication Date:  2002 Apr 
Date Detail:
Created Date:  2002-06-12     Completed Date:  2003-01-03     Revised Date:  2009-01-15    
Medline Journal Info:
Nlm Unique ID:  9318488     Medline TA:  J Chromatogr A     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  175-97     Citation Subset:  IM    
Affiliation:
Meteroroligical Observatory, German Weather Service (DWD), Hohenpeisseberg. christian.plass-duelmer@dwd.de
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MeSH Terms
Descriptor/Qualifier:
Atmosphere*
Calibration
Flame Ionization
Hydrocarbons / analysis*
Quality Control*
Chemical
Reg. No./Substance:
0/Hydrocarbons

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