title: Gaseous reference standards of formaldehyde from trioxane.
abstract: We have developed a dynamic reference standard of gaseous formaldehyde based on diffusion of the sublimate of trioxane and thermal conversion to formaldehyde in the gas phase. We have also produced a gravimetric standard for formaldehyde in a nitrogen matrix, also by thermal conversion of the sublimate of trioxane. Analysis of the gravimetric standard with respect to the dynamic standard has confirmed the comparability of the static and dynamic gravimetric values.
authors.affiliation: National Physical Laboratory, Analytical Science Division, Hampton Road, Teddington, Middlesex, TW11 0LW, UK. paul.brewer@npl.co.uk
authors.forename: Paul J
authors.initials: PJ
authors.lastname: Brewer
authors.forename: Elena Amico
authors.initials: EA
authors.lastname: di Meane
authors.forename: Gergely M
authors.initials: GM
authors.lastname: Vargha
authors.forename: Richard J C
authors.initials: RJ
authors.lastname: Brown
authors.forename: Martin J T
authors.initials: MJ
authors.lastname: Milton
mesh_terms: D000393:Air Pollutants / Q000737:chemistry*; D004784:Environmental Monitoring / Q000592:standards*; D005557:Formaldehyde / Q000737:chemistry*; D005740:Gases; D012015:Reference Standards; D035501:Uncertainty
chemical_list: D000393:Air Pollutants; D005740:Gases; D005557:Formaldehyde