Norm

ISO 1388-7:1981 en

Ethanol for industrial use - Methods of test - Part 7: Determination of methanol content (methanol contents between 0,01 and 0,20 % (V/V)) - Photometric method

31,57

Over deze norm

Status Definitief
Aantal pagina's 4
Gepubliceerd op 01-11-1981
Taal Engels
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. - International Standards ISO 1388/1 to ISO 1377/12 cancel and replace ISO Recommendation R 1388-1970 of which they constitute a technical revision.

Details

ICS-code 71.080.60
Nederlandse titel Ethanol for industrial use - Methods of test - Part 7: Determination of methanol content (methanol contents between 0,01 and 0,20 % (V/V)) - Photometric method
Engelse titel Ethanol for industrial use - Methods of test - Part 7: Determination of methanol content (methanol contents between 0,01 and 0,20 % (V/V)) - Photometric method

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