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An evaluation of a passive monitor for mercury vapor.

Authors
McCammon-r; S-CS; Woodfin-JW
Source
Am Ind Hyg Assoc J 1977 Aug; 38(8):378-386
NIOSHTIC No.
00156784
Abstract
A personal passive mercury (7439976) vapor monitor was evaluated. Three dynamic sampling methods, a tandem mercury sampler, a method using iodine impregnated charcoal tubes for collection of total mercury, and a method using Hopcalite were compared to the passive monitor. A mercury generation system developed by NIOSH was used. An exposure monitor chamber was used to determine the effect of different face velocities. Face velocities of approximately 50, 100, 150, 200, and 250 feet per minute were tested. Accuracy and precision of the methods were determined. The passive monitor was tested for interference from chlorine (7782505), hydrogen-sulfide (7783064), and sulfur-dioxide (7446095). There were large variations in the amount of mercury compared with the charcoal tube. The passive monitor showed excellent correlation with those taken with the tandem tubes over all face velocities. Precision and accuracy data for the passive monitor were excellent. High concentrations of chlorine interfered with the accurate measurement of mercury. There was a slight interference from combined concentrations of hydrogen-sulfide and sulfur-dioxide. Diffusion for collection of mercury vapors and diffusion rate changed with temperature. The authors conclude that the passive monitor is accurate and precise for measuring mercury.
Keywords
NIOSH-Author; Quantitative-analysis; Exposure-levels; Analytical-models; Monitoring-systems; Trace-analysis; Airborne-particles; Analytical-methods; Monitors;
CODEN
AIHAAP
CAS No.
7439-97-6; 7782-50-5; 7783-06-4; 7446-09-5;
Publication Date
19770801
Document Type
Journal Article;
Fiscal Year
1977
NTIS Accession No.
NTIS Price
Issue of Publication
8
ISSN
0002-8894
Source Name
American Industrial Hygiene Association Journal
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