Ethanol for industrial use — Methods of test — Part 5: Determination of aldehydes content — Visual c...
The method is applicable to products having aldehyde contents in the range 0.00025 % (m/m) to 0.00125 % (m/m). The principle is based on the reaction of the aldehydes present in a test portion with Schiff reagent. Visual comparison of the colour obtained with the colours of standard colorimetric solutions containing known quantities of acetaldehyde. - International Standards ISO 1388/1 to ISO…
Applies to all kinds of pulp delivered in bales or rolls, and is recommended for use when sampling for all kinds of testing purposes except for the determination of saleable mass. If the pulp is to be tested for saleable mass, in addition to other properties, the gross sample obtained according to the appropriate International Standard for sampling saleable mass may also be used for the other…
This second edition cancels and replaces the first edition (i. e. ISO 2080:1973). Includes terms widely used in the science and industry of elektrodeposition and metal- finishing. In addition to terms used in the three official ISO languages (English, French and Russian), this International Standard includes the equivalent terms in the German language.Elektrolytisches Herstellen von…
Ethanol for industrial use — Methods of test — Part 6: Test for miscibility with water
The principle of the procedure consists in addition of water to a test portion, under specified conditions, and examination for opalescence against a black background with side illumination, using a second Nessler cylinder containing water as the standard. - International Standards ISO 1388/1 to ISO 1377/12 cancel and replace ISO Recommendation R 1388-1970 of which they constitute a technical…
Ethanol for industrial use — Methods of test — Part 7: Determination of methanol content (methanol c...
The principle is based on the conversion of methanol present in a test portion to formaldehyde by oxidation. The oxidation is carried out with a solution of potassium permanganate in phosphoric acid. Reaction of the formaldehyde formed with chromotropic acid (4,5-dihydroxynaphthalene-2,7-disulphonic acid). Photometric measurement of the violet coloration obtained at a wavelength of about 570 nm…
Ethanol for industrial use — Methods of test — Part 8: Determination of methanol content (methanol c...
The principle is based on the conversion of the methanol present in a test portion to formaldehyde by oxidation with a solution of potassium permanganate in phosphoric acid. Reaction of the formaldehyde formed with Schiff reagent. Visual comparison of the colour obtained with the colours of standard colorimetric solutions containing known quantities of formaldehyde. - International Standards ISO…
Ethanol for industrial use — Methods of test — Part 10: Estimation of hydrocarbons content — Distill...
The principle is based on distillation of a test portion in the presence of water, addition to the distillate of a saturated sodium chloride solution and measurement of the volume of insoluble hydrocarbons. A Hempel fractionating column with Liebig condenser is used for the distillation. - International Standards ISO 1388/1 to ISO 1377/12 cancel and replace ISO Recommendation R 1388-1970 of which…
Ethanol for industrial use — Methods of test — Part 1: General
The document also specifies the methods to be used for the determination of density at 20 °C, for the determination of dry residue after evaporation on a water bath, for the determination of water content, and for the measurement of colour. - International Standards ISO 1388/1 to 1388/12 cancel and replace ISO Recommendation R 1388-1970 of which they constitute a technical revision.
Ethanol for industrial use — Methods of test — Part 2: Detection of alkalinity or determination of a...
The method is applicable to products having acidities equal to or greater than 0.0008 % (m/m). The principle consists in the dilution of a test portion with carbon dioxide-free water, checking whether the test solution is alkaline or acid to phenolphthalein, and, if appropriate, determination of the acidity by titration with standard volumetric sodium hydroxide solution. The acidity is expressed…
Propan-2-ol for industrial use — Methods of test — Part 3: Test for miscibility with water
The procedure consists in addition of water to a test portion, under specified conditions, and followed by examination vertically for any opalescence or turbidity against a black background with side illumination. International Standards ISO 756/1, ISO 756/2 ans ISO 756/3 cancel and replace ISO Recommendation R 756-1968 of which they constitute a technical revision.
