Aktivní norma | Vydána: 01.12.1981

ISO 1388-9:1981

Ethanol for industrial use — Methods of test — Part 9: Determination of esters content — Titrimetric method after saponification
(Éthanol a usage industriel — Méthodes d´essai — Partie 9: Dosage des esters — Méthode titrimétrique apres saponification)

Dostupné jazyky: Anglicky, Francouzsky

Dostupné provedení: Elektronické PDF, Tištěné

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Podrobné informace

Označení: ISO 1388-9:1981

Datum vydání: 01.12.1981

Stran: 3

Země: Mezinárodní technická norma

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Anotace

Description / Abstract: 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 acid solution in the presence of phenolphthalein as indicator. - 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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