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Polycyclic aromatic hydrocarbon analysis. Close-up of sample vials being analysed with a combined gas chromatograph and mass selective detector (GC/MSD). The analysis is measuring the amount of polycyclic aromatic hydrocarbons (PAHs) in samples of UK air. This analysis is part of the DEFRA (Department for Environment Food and Rural Affairs) air quality network. Photographed in 2015, at the National Physical Laboratory, Teddington, UK.
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TOP16651677
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達志影像
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RM
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201521stcenturyairqualityanalysisanalyticalatmosphereatmosphericbritainbritishclose-updefradepartmentforenvironmentfoodandruralaffairsdetailenglandenglishenvironmentalsamplesenvironmentalscienceeuropeeuropeangaschromatographgcgc/msdlablaboratorylondonmassselectivedetectormsdnationalphysicallaboratoryno-onenobodynplpahpahsphysicspollutionpolycyclicaromatichydrocarbonpolycyclicaromatichydrocarbonsresearchteddingtonukunitedkingdom
201521staffairsairanalysisanalyticalandaromaticaromaticatmosphereatmosphericbritainbritishcenturychromatographclose-updefradepartmentdetaildetectorenglandenglishenvironmentenvironmentalenvironmentaleuropeeuropeanfoodforgasgcgc/msdhydrocarbonhydrocarbonskingdomlablaboratorylaboratorylondonmassmsdnationalno-onenobodynplpahpahsphysicalphysicspollutionpolycyclicpolycyclicqualityresearchruralsamplesscienceselectiveteddingtonukunited