BS 7020-3:1988

National foreword
Committees responsible
Method
1 Scope and field of application
2 References
3 Principle
4 Reagents
5 Apparatus
6 Sampling and samples
7 Procedure
8 Expression of results
9 Test report
Annexes
A Flowsheet on the procedure for the acceptance of
   analytical values for test samples
B Derivation of repeatability and permissible tolerance
   equations
C Graphical presentation of precision data obtained by
   international analytical trial
Tables
1 Mass of test portion
2 Combined water contents of test samples
Figures
1 Apparatus for the Karl Fischer measurement (two-
   furnaces-in-series type) (Example)
2 Apparatus for the Karl Fischer measurement
   (interchangeable furnace type) (Example)
3 Karl Fischer absorption cell (Example)
4 Least-squares fit of precision against X for combined
   water

Applicable to combined water contents in the range 0.05 to 10% (m/m) in natural iron ores, and iron ore concentrates and agglomerates including sinter products.

This International Standard specifies a titrimetric method for the determination of the combined water content of iron ores, using Karl Fischer solution.

This method is applicable to a concentration range of 0,05 to 10 % (m/m) of combined water in natural iron ores, and iron ore concentrates and agglomerates including sinter products.

NOTE The term “combined water means that part of the water content of an iron ore that can be removed only at temperatures substantially higher than 100 to 110 °C.