This standard was last reviewed and confirmed in 2018.
Therefore this version remains current.
Abstract
PreviewThe 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.
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Status: PublishedPublication date: 1981-11
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Edition: 1Number of pages: 4
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- ICS :
- 71.080.60 Alcohols. Ethers
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en
| Format | Language | |
|---|---|---|
| std 1 40 | ||
| std 2 40 | Paper |
- CHF40
Life cycle
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Previously
WithdrawnISO/R 1388:1970
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Now
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