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- W2028787316 abstract "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°48′N, 11°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." @default.
- W2028787316 created "2016-06-24" @default.
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- W2028787316 date "2002-04-01" @default.
- W2028787316 modified "2023-09-26" @default.
- W2028787316 title "C2–C8 Hydrocarbon measurement and quality control procedures at the Global Atmosphere Watch Observatory Hohenpeissenberg" @default.
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- W2028787316 doi "https://doi.org/10.1016/s0021-9673(02)00128-0" @default.
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