Spices and condiments — Determination of moisture content — Entrainment method
Specifies a method consisting in determining the amount of water entrained by azeotropic distillatiom, using an organic liquid immiscible with water, and collected in a graduated tube. Lists the apparatus to be used and describes sampling, procedure, expression of results and the details to be included in the test report. An example of an entrainment distillation apparatus is given in an annex.
Hydrochloric acid for industrial use — Determination of oxidizing or reducing substances content — T...
The method is applicable to products having oxidizing or reducing matter contents equal to or greater than 0.001 % (m/m). The principle is based on detection of the presence of these matter by a preliminary qualitative test. In the case of oxidizing matter adding of potassium iodide solution and titration of the liberated iodine with sodium thiosulphate standard volumetric solution until the blue…
Concrete — Determination of air content of freshly mixed concrete — Pressure method
Specifies a method for the determination of the air content of freshly mixed concrete from observation of the change in volume of concrete with a change in pressure. The method is intended for use with concretes and mortars made with relatively dense aggregates for which the aggregate correction factor can be satisfactorily determined by the technique described in clause 5. It is not applicable…
