ISO 1388-9:1981 PDF
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Ethanol for industrial use — Methods of test — Part 9: Determination of esters content — Titrimetric method after saponification
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.
| Edition | 1981 |
|---|---|
| Standard Part No | 9 |
| Published Date | 1981 |
| Published By | International Standardization Organisation |
| Page Count | 3 |
