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Anal Chem

Title:		Atmosphere generation system for the preparation of ambient air volatile organic compound standard mixtures
Author(s):		Perez Ballesta P; Baldan A; Cancelinha J;
Address:		"European Commission, Joint Research Centre, Environmental Institute, Ispra Establishment, 21020 Ispra (VA), Italy"
Journal Title:		Anal Chem
Year:		1999
Volume:		71
Issue:		11
Page Number:		2241 - 2245
DOI:		10.1021/ac981291l
ISSN/ISBN:		0003-2700 (Print) 0003-2700 (Linking)
Abstract:		"A dynamic generation system based on permeation for the preparation of volatile organic compounds at ambient air concentration levels is described herein. The performance of the equipment, sources of uncertainties, and overall uncertainty value are also evaluated. The system is capable of generating multicomponent mixtures at ppb levels and simulating different atmospheric conditions by changing the humidity, concentration level, temperature, and wind velocity. A minimized value for the overall uncertainty in the concentration generated by the system was determined to be +/-1.9% for higher weighing time intervals of 4 weeks"
Keywords:
Notes:		"PubMed-not-MEDLINEPerez Ballesta, P Baldan, A Cancelinha, J eng 1999/06/01 Anal Chem. 1999 Jun 1; 71(11):2241-5. doi: 10.1021/ac981291l"