title: Using thermogravimetry for weight loss monitoring of permeation tubes used for generation of trace concentration gas standards.
abstract: Permeation tubes are convenient analyte sources for generating standard gas mixtures (containing, in particular, volatile organic compounds) used in the calibration of analytical instruments. For small permeation rates, corresponding to trace levels of analytes, the calibration of permeation tubes is time-consuming. The use of thermogravimetry as a means to measure rapidly the weight loss at constant temperature was investigated. An attempt to apply this technique to calibrating a permeation tube filled with benzene is described. In the 20 ng/min range of permeation rate, day-to-day variations of <5% were observed. The continuous weight loss monitoring of permeation tubes by thermogravimetry allows their rapid characterization.
authors.affiliation: Chimie des Matériaux Organiques et Métalliques, Faculté des Sciences, Université de Nice-Sophia Antipolis, France.
authors.forename: Pierre-Charles
authors.initials: PC
authors.lastname: Maria
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Gal
authors.forename: Marta
authors.initials: M
authors.lastname: Balza
authors.forename: Emma
authors.initials: E
authors.lastname: Peré-Trepat
authors.forename: Simonetta
authors.initials: S
authors.lastname: Tumbiolo
authors.forename: Jean-Marie
authors.initials: JM
authors.lastname: Couret
mesh_terms: D000393:Air Pollutants / Q000032:analysis* / Q000592:standards; D004784:Environmental Monitoring / Q000295:instrumentation* / Q000592:standards; D005740:Gases / Q000592:standards; D009930:Organic Chemicals / Q000032:analysis; D012015:Reference Standards
chemical_list: D000393:Air Pollutants; D005740:Gases; D009930:Organic Chemicals