Accuracy 11
Accuracy 11 : General. The ability of a method to determine the "true" concentration of the environment sampled. Accuracy describes the closeness of a typical measurement to the quantity measured although it is defined and expressed in terms of the relative discrepancy of a typical measurement from the quantity measured. The special sense of accuracy for a method is embodied in the following definition and criterion: The accuracy of a method is the theoretical maximum error of measurement, expressed as the proportion or percentage of the amount being measured without regard for the direction of the error that is achieved with 0.9 probability by the method. NIOSH Technical Report: Guidelines for Air Sampling and Analytical Method Development and Evaluation. http: //www.cdc.gov/niosh/docs/95-117/pdfs/95-117.pdf
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