Abstract
Abstract A method has been developed for the estimation of the quantities of vanillic acid, p-hydroxybenzoic acid, and p-hydroxybenzaldehyde in vanilla extracts. This method separates these compounds from each other and from vanillin by two-dimensional paper chromatography. An estimate of the quantity of each of these compounds is obtained by measuring the area of the colored spot produced on reacting the compounds with chromogenic reagents. The vanillin content was also determined by two different methods. Vanilla planifolia was found to have an unidentified phenolic component not present in V. tahitensis. The Tahiti vanillas contained over twice as much p-hydroxybenzoic acid as any other vanilla extracts.
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