OS GSO ISO 8466-2:2008
ISO 8466-2:2001
Omani Standard
Current Edition
·
Approved on
03 September 2008
Water quality - Calibration and evaluation of analytical methods and estimation of performance characteristics - Part 2: Calibration strategy for non-linear second-order calibration functions
OS GSO ISO 8466-2:2008 Files
English
12 Pages
Current Edition
Reference Language
OMR
30.98
OS GSO ISO 8466-2:2008 Scope
It is not always possible to accurately describe the relationship between a set of calibration points with a rectilinear curve, even by decreasing the working range. Instead of the linear regression analysis, a least-squares fit to a second-order polynomial is applied (see test for linearity in 4.1.3 of ISO 8466-1:1990[1]). Using this fit, it is possible to calculate not only the calibration function but also the confidence interval associated with it. This part of ISO 8466 is intended primarily for use in method development and may not necessarily be applicable to all routine analyses.
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