ISO/IEC code of principles on "reference to standards"
The standards-making procedures of ISO and IEC and their members are at the disposal of intergovernmental organizations and national governmental agencies wishing to use the principle of reference to standards. This Guide gives 5 principles which have been adopted by the ISO and IEC Councils with a view to guiding the work of ISO and IEC towards standards which can be referenced in legislation or…
Éléments standard pour la construction des machines-outils — Bâtis centraux et montants
La présente Norme internationale fixe certaines dimensions d'interchangeabilité des bâtis centraux et des montants utilisés dans les machines spéciales construites à l'aide d'éléments standard.
ISO/IEC code of principles on "reference to standards"
The standards-making procedures of ISO and IEC and their members are at the disposal of intergovernmental organizations and national governmental agencies wishing to use the principle of reference to standards. This Guide gives 5 principles which have been adopted by the ISO and IEC Councils with a view to guiding the work of ISO and IEC towards standards which can be referenced in legislation or…
A semiquantitative method for the determination of the amount of free phenols in phenolic mouldings. Hot water extraction of free phenols from a powdered test portion, iodination of the water extract and backtitration of the excess of iodine with standard volumetric thiosulfate solution.
Plastics — Phenol-formaldehyde mouldings — Determination of free ammonia and ammonium compounds — Co...
Specification of a semi-quantitative method. The content of free ammonia in a moulded article is of importance, when corrosion of metal inserts or contamination in contact with the article has to be considered. Distillation of the aqueous extract from a powdered test portion, coloration of the distillate by reaction with Nessler reagent and comparison of the colour with that of standard matching…
(Supersedes CGA 3.8-1972) This standard applies to equipment
fired with natural gas or propane in the liquid or vapour phase
for the purpose of drying farm crops.
Signs and Symbols for the Occupational Environment
Applies to signs for use in the occupational environment. It
describes requirements for the shape and colour of signs and sets
down a classification system, defined so as to assist the user in
determining what signage is needed. The standard also includes
requirements for glyphs which may be used with or without
legends, subject to the limitations of the standard, to describe
a specific…
Hydrometers — Principles of construction and adjustment
Glass hydrometers of constant mass which do not incorporate a thermometer are considered. Basis of scale, reference temperature, surface tension and reference levels for adjustment and reading are specified. In annex A the standard categories of surface tension are tabled, and annex B deals with the adoption of density as preferred basis of scale.
Soaps — Determination of chlorides content — Potentiometric method
The method is carried out as follows: Potentiometric titration of the chloride ions with standard volumetric silver nitrate solution in a nitric acid medium, using a silver-silver chloride measurement electrode and a calomel reference electrode.
