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PS 1567-2-2026
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Water quality — Calibration and evaluation of analytical methods and estimation of performance characteristics — Part 2: Calibration strategy for non-linear second-order calibration functions
Committee:
Environment
Sector:
Environment
Available Standards
Original Standard
إنجليزي (English)
18
Page
2026
International Classification for Standards (ICS)
| Code | Classification |
|---|---|
| 13.060.01 | Water quality in general |
Adopted Standards
| Standards / Amendment / Corrigendum | |
|---|---|
| 1 | ISO 8466-2:2001 |
Replacement Sequence
| Replaces |
|---|
| PS 1567-2-2010 |
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 PS 1567 is intended primarily for use in method development and may not necessarily be applicable to all routine analyses.