| Autor: |
Zeringue, H. J., Feuge, R. O. |
| Zdroj: |
Journal of the American Oil Chemists' Society; January 1981, Vol. 58 Issue: 1 p38-41, 4p |
| Abstrakt: |
The quantitative determination of cyclopropene acids occurring as esters in seed oils can be made by a direct titration with hydrogen bromide in toluene, but the color indicator used heretofore to determine the end point presented problems. A potentiometric titration that avoids these problems was devised. A silver-silver chloride indicator electrode and a calomel reference electrode connected to the titration cell by a salt bridge were employed. The precision of the cyclopropene analysis of purified samples seems to depend primarily on the accuracy to which the amount of titrant can be determined. At the 1% level, reproductible values to about ±0.01% are obtained. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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