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Glavni meni

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
1. 11. 1981.

Опште информације

90.93     29. 11. 2023.

ISO

ISO/TC 47

Međunarodni standard

71.080.60  

francuski   engleski  

Kupovina

Objavljen

Jezik na kome želite da primite dokument.

Apstrakt

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.

Životni ciklus

PRETHODNO

POVUČEN
ISO/R 1388:1970

TRENUTNO

OBJAVLJEN
ISO 1388-7:1981
90.93 Odluka o potvrđivanju standarda
29. 11. 2023.

Nacionalna preuzimanja

Etanol za industrijsku upotrebu — Metode ispitivanja — Deo 7: Određivanje sadržaja metanola (sadržaj metanola u granicama od 0,01 % do 0,20 % zapreminske frakcije) — Spektrofotometrijska metoda

90.93   Odluka o potvrđivanju standarda

Etanol za industrijsku upotrebu - Određivanje sadržaja metanola (u granicama od 0,01 do 0,20 % (V/V)) - Spektrofotometrijska metoda

95.99   Povučen