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ISO 8466-2:2001

Water quality — Calibration and evaluation of analytical methods and estimation of performance characteristics — Part 2: Calibration strategy for non-linear second-order calibration functions

Publication date:   Nov 1, 2001

General information

90.93   Standard confirmed   Mar 17, 2023

ISO

ISO/TC 147/SC 2 Physical, chemical and biochemical methods

International Standard

13.060.01   Water quality in general

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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.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 8466-2:1993

NOW

PUBLISHED
ISO 8466-2:2001
90.93 Standard confirmed
Mar 17, 2023