Paraformaldehyde for industrial use — Methods of test — Part 1: General
Specifies the laboratory sample to have a mass of not less than 500 g. Before carrying out the tests, the sample shall be grind to a fine powder and mixed thoroughly. - ISO 1391, Parts 1 to 4, replace ISO Recommendation R 1391-1970.
Aluminium oxide primarily used for the production of aluminium — Preparation and storage of test sam...
Specifies the preparation of laboratory samples, crude samples for the determination of certain geometric properties and physical and pysico-chemical tests including the determination of moisture content and dried samples. The principle consists in grinding and sieving of the sample until passing completely through a sieve of meshes having apertures of 0,2 mm. Mixing and drying at about 300 °C.…
Paints and varnishes — Determination of light fastness of paints for interior use
Specifies a method for operating laboratory equment. It does not attempt to define either the minimum accetable standard or the precise techniques to be adopted for the test; these are to be the subject of agreement between the interested parties. The posible forms which the test requirement may take are the following: The test material shall be at least as ligthfast as a specified wool scale…
Sulphur for industrial use — Determination of acidity — Titrimetric method
Applicable to products having acidities, expressed as H2 SO4 , equal to or more than 0.01 % (m/m). Describes the extraction of acidic substances with a mixture of water and propan-2-ol (isopropyl alcohol). Titration of the extract with standard volumetric sodium hydroxide solution in the presence of phenolphthalein as indicator. The preparation of the sample from the laboratory sample is carried…
The requirements deal with four series of conial ground joints. The conicity, the great diameter and the length of the ground joint including the tolerances are specified and tabled. In addition the surface finish and the peak-to-valley height are specified. In annex A a system of gauging for the diameters and lengths of these joints are given, in annex B a method of testing the leakage including…
Road vehicles — Measurement of impact velocity in collision tests
Specifies the accuracy of measurement of the impact velocity. Describes in the annex some typical methods suitable for the measurement. These methods are intended to facilitate the comparison of data obtained in similar tests by different laboratories. Other methods may be used provided they meet the requirements of 2.1 and 2.2.
Sodium perborates for industrial use — Determination of rate of solution — Conductivity method
Gives a conductive method for determining the rate of solution. Describes the principles of the procedure by dissolution of an agreed test portion in water at an agreed temperature, with controlled agitation. Measurement of the conductivity of the solution, at certain intervals, of the final conductivity (when the sample is completely dissolved) and calculation of the ratio of conductivities to…
Potassium chloride for industrial use — Determination of potassium content — Flame emission spectrop...
Is applicable to products having a minimum KCl content of about 95 % (m/m). The principle consists in dissolution of a test portion taken from the laboratory sample, previously ground and sifted. Acidification to pH 1 after suitable dilution, and atomization of the resultant solution in the burner of a flame spectrophotometer. Measurement of the intensity of the 766 nm ray, compared with the…
Potassium chloride for industrial use — Determination of potassium content — Potassium tetraphenylbo...
The method is applicable to products having a minimum KCL content of about 95 % (m/m). The principle consists in dissolution of a test portion taken from the laboratory sample, previously ground and sifted. Addition of formaldehyde solution to transform any ammonium ions present into hexamethylenetetramine, and of ethylenedinitrilotetraacetic acid, disodium salt, to complex any extraneous cations…
