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Workplace TRIG and Air-Purifying Respiratory Protection / HG. Poovey, RJ. Rando

Conference Author
Isocyanates: Sampling, Analysis, and Health Effects (2000 : Orlando, Florida)
Published
West Conshohocken, Pa. : ASTM International, 2001.
Physical Description
1 online resource (13 pages) : illustrations, figures, tables
Additional Creators
Rando, RJ., Poovey, HG., American Society for Testing and Materials, and ASTM International
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Summary
Paired total and respirable particulate samples were collected in the breathing zone of 186 painters at five Air Force bases. Using the composition of the starting material to estimate total reactive isocyanate group (TRIG), exposure levels were 0.87 mg/M3 (geometric mean) in the total fraction and 0.12 mg/M3 in the respirable fraction with geometric standard deviations of 2.7 and 3.3, respectively. Dichotomous samplers specific for TRIG were used during the painting of a military vehicle and indicated 0.39 ¿̐ư 0.15 mg/M3 TRIG. This was 20 times the Health and Safety Executive's recommended time weighted average for TRIG. The TRIG levels seen in these studies indicate the need for personal protective equipment or additional engineering controls. Breakthrough studies with 1,6 hexamethylene diisocyanate (HDI) and HDI-biuret were conducted on a series of negative pressure air purifying respirator (APR) cartridges. Initial penetration of TRIG through the APR cartridges ranged from greater than 70% to less than 3% giving apparent protection factors of >1.5 and >33. These samples also showed that HDI was present in the aerosol fraction at levels significantly below its saturated vapor pressure.
Dates of Publication and/or Sequential Designation
Volume 2001, Issue 1408 (January 2001)
Subject(s)
Other Subject(s)
ISBN
9780803154568 (e-ISBN)
9780803128798
0803128797
Digital File Characteristics
text file PDF
Bibliography Note
Includes bibliographical references 20.
Other Forms
Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
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Also available in PDF edition.
Reproduction Note
Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 2001. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
Technical Details
Mode of access: World Wide Web.
Source of Acquisition
ASTM International PDF Purchase price USD25.
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