{"ob_id":26436,"uuid":"74ff02c9d9514750ba53f2ca15464812","title":"Gas chromatography HP 6890 series","abstract":"Hewlett Packard HP 6800 Gas chromatography measures dry air CH4 mixing ratio. Basic principle: sample air is added to a carrier gas stream which enters a material (called a column) for which passage of different molecules takes different time. Thus a gas mixture can be decomposed in its molecular specific components and these can then be quantified given known standards.","keywords":"Gas chromatography","identifier_set":[],"instrumentType":"gas_chromatograph","subInstrument":[],"responsiblepartyinfo_set":["https://catalogue.ceda.ac.uk/api/v2/rpis/110981/?format=json"]}