Methods for the determination of cyclopropenoid fatty acids. VII. The dilution‐HBr‐titration technique as a general method

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Abstract
The stepwise HBr titration method for the cyclopropenoid analysis of cottonseed oils is subject to serious inaccuracies when applied to samples containing higher cyclopropenoid concentrations, particularly if they contain appreciable amounts of alumina‐adsorbable materials. A modification of the method is described which eliminates these sources of error. Its validity has been established by the analysis of a wide range of synthetic compositions including compositions containing massive amounts of interfering HBr‐reactive substances and other alumina‐adsorbable materials. The method with further modification can be used to analyze glycerides with the same high degree of accuracy.