Results 171 to 180 of about 3,949 (205)
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Interlaboratory comparison of serum thyroxine analyses
Clinical Biochemistry, 1982Approximately 300 clinical chemistry laboratories participated in a survey of measurements of the thyroxine (T4) concentration in 13 lyophilized serum specimens prepared by spiking a base serum pool with several different levels of T4. Of 35 commercially available kit methods, 4 kits were used by 30 or more laboratories, and 9 by 10 or more ...
F W, Spierto +4 more
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Interlaboratory comparison of blood lead determinations
American Industrial Hygiene Association Journal, 1979Results are presented for an interlaboratory proficiency study of blood lead determinations. Samples were pooled from individuals occupationally exposed to lead. Performance of individual laboratories is compared over a two year period. With increased emphasis in recent years on proficiency studies of this type, agreement between laboratories has been ...
C C, Maher, D M, Roettgers, H J, Conlon
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Interlaboratory Comparisons in Water Bacteriology
Journal AWWA, 1967The Sanitation and Radiation Laboratory of the California State Department of Public Health frequently has been requested to examine laboratories whose test results disagree. If a procedural review demonstrated no apparent deficiencies, further comparison of the laboratories has been made on the basis of a split‐sample study with relatively superficial
Arnold E. Greenberg +3 more
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Analysis of carbonaceous aerosols: interlaboratory comparison
The Analyst, 1998Carbonaceous aerosols are present in many workplace and environmental settings. Some of these aerosols are known or suspect human carcinogens and have been linked to other adverse health effects. Exposure to diesel exhaust is of particular concern because it has been classified as a probable human carcinogen and use of diesel-powered equipment is ...
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Interlaboratory comparison of fluorocarbon measurements
Atmospheric Environment (1967), 1978Abstract Concern for the uncertainty in the precision and accuracy of the past and present halocarbon measurements prompted an informal interlaboratory comparison in 1977. The intercomparison of 16 labs for F11 and F12 gave standard deviations from the mean of 11 to 17%.
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Interlaboratory comparison of nortriptyline levels
Biochemical Medicine, 1978G D, Burrows +6 more
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