Main Title |
Limits of Uncertainty of Environmental Measurements. (Using as an Example, the Dichotomous Particulate Sampler). |
Author |
Rhodes, R. C. ;
|
CORP Author |
Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab. |
Publisher |
Feb 90 |
Year Published |
1990 |
Report Number |
EPA/600/D-90/014; |
Stock Number |
PB90-200734 |
Additional Subjects |
Limits(Mathematics) ;
Environmental surveys ;
Measuring instruments ;
Formulas(Mathematics) ;
Comparison ;
Air flow ;
Error analysis ;
Graphs(Charts) ;
Measurement ;
Bias ;
Accuracy ;
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB90-200734 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
22p |
Abstract |
Two different methods are used to determine the limits of uncertainty for environmental measurements. The first employs the general propagation of error formula. In this method, the precisions and accuracies of each of the variables of the mathematical expression defining the final measurement result are used. A second method utilizes the agreement of results from co-located samplers to estimate precision and results of independent audits to estimate bias. Each of the methods has certain advantages. The end results, using the dichotomous particulate sampler as an example, show that the use of co-located samplers reveals the presence of unaccounted for sources of error not considered by the method using the propagation of error formula. |
NTIS Title Notes |
Symposium paper. |
Category Codes |
68; 72B |
NTIS Prices |
PC A03/MF A01 |
Primary Description |
600/09 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
016616752 |
Origin |
NTIS |
Type |
CAT |