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Two cases are considered: sulphuric acid contents equal to or lower than 98 % (m/m) and sulphuric acid contents higher than 98 % (m/m). The principle is based on oxidation of a test portion with hydrogen peroxide and titration of the total acidity with a standard volumetric sodium hydroxide solution, in the presence of methyl red as indicator. - Replaces ISO Recommendation R 910-1968.

Applicable to products having contents of equal to or more than 0.05 % (m/m) (with flame atomic absorption) or 0.1 % (m/m) (with fotometric absorption). Covers the formation of a complex between biuret and copper(II) sulphate in alkaline medium. Fixation of this complex on an anion exchange resin. Elution of Cu first with a potassium nitrate solution and then with a nitric acid solution. Flame…

Specifies the constructional requirements of portable, mobile and fixed apparatus for industrial radiography of category I (sealed source not removed for exposure) and II (sealed source projected out of the container by an operator at a distance). Operational usage of exposure containers is not covered. As the transport of apparatus is concerned, the requirements of the relevant transport…

Specifies mandatory and optional markings of general purpose valves and states the manner of applying the markings, i.e. on the body, on a flange, or on a identification plate. Markings on the body may be integral with the body or on a plate securely fixed to the body. The table lists those items which may be included in international standards for individual types of valves.

Applies to flat sheets composed of portland cement and asbestos fiber, with or without the addition of curing agents or mineral fillers, intended for industrial, commercial and general building purposes.