Ethanol for industrial use — Methods of test — Part 11: Test for detection of furfural
The principle consists in the treatment of a test portion with aniline and acetic acid, the presence of furfural leading to the formation of a characteristic red colour. - International Standards ISO 1388/1 to ISO 1377/12 cancel and replace ISO Recommendation R 1388-1970 of which they constitute a technical revision.
Ethanol for industrial use — Methods of test — Part 12: Determination of permanganate time
The principle is based on the addition of a test portion, under specified conditions, of potassium permanganate solution. Determination of the time taken for the colour of this test solution to match that of a cobalt(II) chloride and uranyl nitrate colour standard. - International Standards ISO 1388/1 to ISO 1377/12 cancel and replace ISO Recommendation R 1388-1970 of which they constitute a…
Ethanol for industrial use — Methods of test — Part 9: Determination of esters content — Titrimetric...
The method is applicable to products having esters contents in the range 0.005 % (m/m) to 0.15 % (m/m). The principle consists in the saponification of esters present in a test portion by boiling with excess standard volumetric sodium hydroxide solution; determination of the residual sodium hydroxide, and hence the amount used for saponification, by titration with standard volumetric hydrochloric…
Ethanol for industrial use — Methods of test — Part 3: Estimation of content of carbonyl compounds p...
The method is applicable to products having carbonyl compounds contents between 0.00025 % (m/m) and 0.01 % (m/m). The principle is based on reaction in acid medium of the carbonyl compounds in a test portion with 2,4-dinitrophenylhydrazine. Formation of the corresponding 2,4-dinitrophenylhydrazones which, after making the solution alkaline, take on a red coloration. Photometric measurement of…
Ethanol for industrial use — Methods of test — Part 4: Estimation of content of carbonyl compounds p...
The method is applicable to products having carbonyl compounds contents equal to or greater than 0.01 % (m/m). The method only allows determination of those carbonyl compounds which react under the specified conditions. The principle is based on the reaction of hydroxylammonium chloride with the carbonyl compounds in a test portion and titration of the hydrochloric acid formed with standard…
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…
