BS ISO 14897:2002

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Application
6 Interferences
7 Reagents
8 Apparatus
9 Sampling
10 Standardization of reagent
11 Procedure
12 Expression of results
13 Precision and bias
14 Test report
Annex A (informative) Interlaboratory precision studies

Defines methods to measure the water content of polyols which are employed as polyurethane raw materials. Method A: a manual amperometric method included to define the principles of the Karl Fischer measurement. Method B: includes an automated amperometric procedure and an automated coulometric procedure.

This International Standard specifies methods used to measure the water content of polyols employed as polyurethane raw materials. Method A is a manual amperometric method which has been included to better define the principles of the Karl Fischer measurement. Amperometric methods are applicable to a wide range of polyols, including those which have enough colour to obscure a visual end-point. Method B includes an automated amperometric procedure and an automated coulometric procedure. The coulometric procedure is an absolute method that does not require calibration and gives improved sensitivity compared with amperometric methods.