Soaps and detergents — Determination of chelating agent content — Titrimetric method
A test portion of the sample is dissolved in water, the pH of the solution adjusted to 4.65 and the solution titrated against standard copper(II) sulphate solution using 1-(2-pyridylazo)-2-naphthol as indicator. Principally the method has been designed principally for determining ethylenediaminetetraacetic acid (EDTA) and it salts. Before determining other chelating agents, or determining…
Surface active agents — Preparation of water with known calcium hardness
A stock solution is prepared by dissolving an appropriate quantity of calcium chloride in water. The calcium content of this stock solution is determined by complexometric titration with the disodium salt of (ethylenedinitrilo)tetraacetic acid (EDTA) using a mixture of Mordant Black 11 (C.I. 14645) and methyl red as indicator. Dilute solutions of the hardness required are prepared by dilution of…
Standard for Emergency Breakaway Fittings for Flammable and Combustible
Liquids
These requirements cover emergency breakaway fittings intended
only for flammable and combustible liquid service excluding
gasoline/alcohol blends or high aromatic content gasolines.
Lamp caps and holders together with gauges for the control of interchangeability and safety. Part 4:...
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Consolidated edition incorporating the sheets of the first edition (1990) plus supplements A, B, C and D valid on 1996-12-31.
Culots de lampes et douilles ainsi que calibres pour le contrôle de l'interchangeabilité et de ...
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Edition consolidée incorporant les feuilles de la première édition et ses compléments A, B, C et D en vigueur au 31 décembre 1996.
The method is applicable to the determination of acid-soluble and/or total aluminium content between 0,005 % (m/m) and 0,20 % (m/m). Specifies definition, principle, reagents, apparatus, sampling, procedure, expression of results and test report. The annexes give additional information on the international co-operative tests, a graphical representation of precision data and procedures for the…
