Higher alcohols for industrial use — Methods of test — Part 5: Determination of total alcohols conte...
Relates to C6 to C13 alcohols. The principle based on esterification of alcohols present in a test portion by means of acetic anhydride, and titration of the excess acetic anhydride with a standard volumetric ethanolic potassium hydroxide solution, in the precence of phenolphtalein as indicator.
Maleic anhydride for industrial use — Methods of test — Part 4: Determination of maleic anhydride co...
The principle consists in the dissolution of a test portion in diluted standard volumetric sodium hydroxide solution and titration with standard volumetric sodium hydroxide solution in presence of phenolphthalein as indicator. - ISO 1390, Parts 1 to 6, replace ISO Recommendation R 1390-1970.
Maleic anhydride for industrial use — Methods of test — Part 6: Determination of iron content — 2,2&...
The principle is based on the dissolution, in hot hydrochloric acid, of the residue from the determination of the ash of a test portion (see ISO 1390/5). Reduction, by hydroxylammonium chloride, of the iron(III) contained in the solution thus obtained, formation of the coloured complex iron(II)-2,2'bipyridyl in a buffered medium. Photometric measurement of the coloured complex at a…
Aluminium and aluminium alloys — Determination of nickel — Spectrophotometric method using dimethylg...
The method is applicable to nickel contents between 0,001 and 3 % (m/m). Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report.
Higher alcohols for industrial use — Methods of test — Part 1: General
Gives general instructions for C6 to C13 alcohols and also specifies the methods to be used for the measurement of the colour, the determination of the density at 20 °C and the determination of the water content.
Higher alcohols for industrial use — Methods of test — Part 3: Determination of carbonyl compounds c...
Relates to C6 to C13 alcohols. The principle bases on reaction of carbonyl compounds present in a test portion with hydroxylammonium chloride to from an oxime, and potentiometric titration of the hydrochloric acid liberated with standard volumetric ethanolic potassium hydroxide solution.
Gas cylinders for medical use — Marking for identification of content
Cancels and replaces ISO recommendation R 32-1957, and its amendment 1-1966. Establishes a system of marking and a series of colours for the identification of the content of gas cylinders. In the case of gas mixtures, the cylinder shall bear the appropriate colours for the gases comprising the mixture, such colours to be visible from the valve end.
Aluminium and aluminium alloys — Determination of magnesium — Atomic absorption spectrophotometric m...
The method is applicable to products having magnesium contents between 0,01 and 5 % (m/m). Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report.
Phenol, o-cresol, m-cresol, p-cresol, cresylic acid and xylenols for industrial use — Methods of tes...
Gives also the procedure to be used for the determination of water content by the Karl Fischer method. This method is applicable only to liquefied phenol and m-cresol. The determination of density at 20 °C is applicable only to liquefied phenol, m-cresol, cresylic acid and xylenols.
Phenol, o-cresol, m-cresol, p-cresol, cresylic acid and xylenols for industrial use — Methods of tes...
This method is the best available at the present time. It was primarily intended for samples containing 40 % (m/m) or more but has been extended to lower ranges. The principle is based on dehydration of a quantity of the test sample. Formation of a complex between o-cresol and cineole (having a crystallizing point not lower than 1,2 °C) by addition of excess cineole to a test portion of the…
