Atmosphere Generation System for the Preparation of Ambient Air Volatile Organic Compound Standard Mixtures

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...

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Bibliographic Details
Published in:Analytical chemistry (Washington) 1999-06, Vol.71 (11), p.2241-2245
Main Authors: Pérez Ballesta, P, Baldan, A, Cancelinha, J
Format: Article
Language:English
Subjects:
Air
Applied sciences
Atmospheric pollution
Chemistry
Exact sciences and technology
Pollution
VOCs
Volatile organic compounds
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Description
Summary: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.
ISSN:0003-2700
1520-6882
DOI:10.1021/ac981291l