Ammonium sulphate for industrial use — Determination of ammoniacal nitrogen content — Titrimetric me...
Based on dissolution of a test sample in water, distillation of the ammonia after displacement by an alkali solution. Absorption in an excess of standard volumetric sulphuric acid solution and back-titration with standard volumetric sodium hydroxide solution in the presence of methyl red/methylene blue mixed indicator. A typical distillation apparatus is shown in a figure.
Heat exchangers — Verification of thermal balance of water-fed or steam-fed primary circuits — Princ...
A number of suitable arrangements of test apparatus are illustrated in the annex. ISO 3147 is applicable to tests of primary circuits performed in the steady-state condition, in accordance with the specifications laid down for each type of appliance in the relevant International Standards. Where appropriate, special arrangements required for certain types of appliance may also be given in these…
Zinc alloys — Determination of copper content — Electrolytic method
The method is applicable to zinc alloy Zn Al 4 Cu 1. It is suitable for the determination of copper contents between 0,5 and 3,5 %. This International Standard specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report.
1.1 This Standard applies to helmets intended to provide protection for the heads of ice hockey players from impact and defines the areas of the head which are to be protected. It covers requirements for the construction and finish of helmets, and the materials to be used for the shell and cradle. Marking requirements are also included.
NOTE: Metric equivalents are included for information…
Sodium hydroxide for industrial use — Determination of carbonates content — Titrimetric method
Applicable to products having contents, expressed as CO2 , of more than 0.01 % (m/m). Relates to a procduct containing neither sulphides nor chlorates or only sulphides or only chlorates. Preliminary test by boiling an acidified test sample in the presence of methyl orange and with a lead acetate paper strip in the vapour. The sulphides blacken the paper and chlorates delolourize the methyl…
Statistical interpretation of data — Determination of a statistical tolerance interval
Methods are specified enabling a sample to be used as the basis for determining a statistical tolerance interval, which may be two-sided or one-sided. They are applicable only where the sample unity may be assumed to have been selected at random and are independent, and if the distribution is normal (if appropriate, transforming the variate may make it normal). Tables 1 and 2 are applicable to…
Specifies the characteristics of the Atmosphere Type ISO which is applicable to planning under identical conditions, to test results end elements. Permits the unification in the range of tests and calibration of instruments. Is recommended for treatment of results of observations of geophysics and meteorology.
The Physical Properties of Douglas Fir and Western Larch Poles and
Reinforcing Stubs
1. SCOPE
1.1 This Standard covers the physical properties and workmanship of Douglas
Fir (Pseudotsuga menziesii) and Western Larch (Larix accidentalis) poles and
reinforcing stubs.
1. Definition
1.1 This standard applies to squares ordinarily used by carpenters, diemakers,
machinists, and others in determining angles when fabricating parts from wood,
metal or other materials.
Glycerine for industrial use — Determination of glycerol content — Titrimetric method
Applicable to the analysis of glycerines free from organic compounds other than glycerol having more than two hydroxyl goups on adjacent carbon atoms, such as sugars which can also give rise to formic acid and, for this reason, will interfere in the determination. The procedure begins with a cold oxidation of the glycerol by sodium periodate in a strongly acid medium, followed by titration of the…
