ASTM Int'l Water Committee Issues Measurement Uncertainty Standard - ASTM D 7366
November 25, 2008 // Published as a news service by IHS
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ASTM International Committee D19 on Water approved ASTM D 7366 - Practice for Estimation of Measurement Uncertainty for Data from Regression-Based Methods.
Analysts in laboratories that use regression-based methods to determine uncertainty in data and customers that request such measurements will be the primary users of the standard, said ASTM International.
ASTM D 7366 was developed by Subcommittee D19.02 on Quality Systems, Specification and Statistics.
According to Lynn Vanatta, chair of the measurement uncertainty task group within D19.02 and manager of ion-chromatography research and statistics at Air Liquide-Balazs, ASTM D 7366 fills a gap in the metrology standards arena.
"While measurement uncertainty is becoming more and more of a concern and while there are documents that address the calculation of this quantity, the focus has been on measurements that do not involve regression," said Vanatta.
"The more involved statistical approach of regression is needed when instrumental responses such as peak area or absorbency have to be transformed into useful units such as concentration."
"ASTM D 7366 provides a statistically sound method to calculate the overall uncertainty in data from such analytical methods," said Vanatta.
Source: ASTM International.