Accurate Calibration of Mercury Vapour Indicators for Occupational Exposure Measurements using a Dynamic Mercury Vapour Generator

An accurate and rapid calibration procedure for mercury vapour indicators used for occupational exposure measurements is described, using a dynamic mercury vapour generator traceable to the standard bell-jar calibration apparatus. The method provides greater flexibility, accuracy, and trace ability...

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Bibliographic Details
Published in:Instrumentation science & technology 2008-11, Vol.36 (6), p.611-622
Main Authors: Brown, Richard J. C., Brown, Andrew S., Corns, Warren T., Stockwell, Peter B.
Format: Article
Language:English
Subjects:
Bell-jar
Calibration
Mercury vapour
Occupational exposure
Traceability
Uncertainty
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Summary:An accurate and rapid calibration procedure for mercury vapour indicators used for occupational exposure measurements is described, using a dynamic mercury vapour generator traceable to the standard bell-jar calibration apparatus. The method provides greater flexibility, accuracy, and trace ability than the usual methods for the calibration of mercury vapour indicators used for occupational exposure measurements. The calibration procedure allows a correction to be applied to the mass concentration value displayed by the mercury vapour indicator. Measurement results from the mercury vapour indicator at the occupational exposure limit of 25 µg ·m −3 , following calibration, have been estimated to have an expanded uncertainty of 8%.
ISSN:1073-9149
1525-6030
DOI:10.1080/10739140802448309