Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Performance of permeation tubes as standard gas sources.

Authors
Saltzman-BE; Burg-WR; Ramaswamy-G
Source
Environ Sci Technol 1971 Nov; 5(11):1121-1128
NIOSHTIC No.
00071249
Abstract
Important factors affecting the accuracy of permeation tubes for nitrogen-dioxide (10102440), propane (74986), butene-1, and butane (106978) were studied. Two new methods of sealing the tube ends were developed. Lifetimes of tubes were greatly extended by attaching to one end a glass or stainless steel bottle. Systems for their storage, calibration, and use were improved. Propane tubes required some aging at 30 degrees centigrade before reproducible rates in the 20 to 30 degrees centigrade range could be achieved. Humidity seriously affected the permeation rates of nitrogen-dioxide tubes; even the past history of exposure was important. A convenient method for volumetric in situ calibration in the working flow dilution system was developed for rapid and precise results. Tubes for nitrogen-dioxide were not reliable as precision primary standard gas sources, unless recently calibrated.
Keywords
NIOSH-Publication; NIOSH-Grant; Grants-other; Toxic-gases; Nitrogen-oxides; Aliphatic-hydrocarbons; Hydrocarbons; Measurement-methods; Air-quality-measurement; Penetration; Impregnation; Methodology
Contact
Environmental Health Kettering Laboratory College of Medicine Cincinnati, Ohio 45219
CODEN
ESTHAG
CAS No.
10102-44-0; 74-98-6; 106-97-8
Publication Date
19711101
Document Type
Journal Article
Funding Amount
714769
Funding Type
Grant
Fiscal Year
1972
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-T01-OH-00028
Issue of Publication
11
ISSN
0013-936X
Priority Area
Other Occupational Concerns; Grants-other
Source Name
Environmental Science and Technology
State
OH
Performing Organization
University of Cincinnati, Cincinnati, Ohio
TOP