Chemical Science and Technology
Laboratory
Assignment of Uncertainty in Databases
vDatabase Design:
•Stored in the form of a numerical value
•Interpreted as a bias for the associated property
value
•Graphical representation
vAssignment Criteria:
•Sample purity
•Special effects – contamination or
decomposition
•Measurement technique
•Completeness and adequacy of the procedure
description
•Agreement among duplicate measurements
•Estimates of uncertainty, precision, or
reproducibility by authors
•Experience/records of the investigator