0 Items
My account
Phone: (011) 7541-421, 3409-301, 3409-335, 6547-293, 3409-310
E-mail: Standards sales: prodaja@iss.rs Education: iss-edukacija@iss.rs Information about standards: infocentar@iss.rs
Stevana Brakusa 2, 11030 Beograd
Main menu

ISO 1388-7:1981

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

Nov 1, 1981

General information

90.93     Nov 29, 2023

ISO

ISO/TC 47

International Standard

71.080.60  

French   English  

Buying

Published

Language in which you want to receive the document.

Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO/R 1388:1970

NOW

PUBLISHED
ISO 1388-7:1981
90.93 Standard confirmed
Nov 29, 2023

National adoptions

SRPS ISO 1388-7:2014  
ISS

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

90.93   Standard confirmed

H047 more

SRPS H.B8.236:1988  
ISS

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

95.99   Withdrawal of Standard

H047 more