Iron ores — Determination of combined water content — Karl Fischer titrimetric method
This method ist 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. 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. Figures show the general arrangement of the test…
Iron ores — Determination of arsenic content — Molybdenum blue spectrophotometric method
The method ist applicable to a concentration range of 0,0001 to 0,1 % (m/m) (1 bis 1000 /g) of arsenic in natural iron ores, and iron ore concentrates and agglomerates including sinter products. Specifies principle, reagents, apparatus, sampling and samples, procedure, expression of results, and test report. Includes three annexes. A figure shows the arsenic distillation apparatus.
Milk products and milk-based foods — Determination of fat content by the Weibull- Berntrop gravimetr...
Specification of a method to those products, that may containe high levels of stabilizer or tickening agent or of egg yolk or of fruit. It consists in digesting of a test portion by boiling with dilute hydrochloric acid, filtrating of the hot digest through a wetted filter paper, extracting of the fat from the dried filter paper using n-hexane or light petroleum, removing of the solvent by…
