A rapid quantitative method for the estimation of citral in lemon oil is described. It uses temperture‐programmed gas‐liquid chromatography on an OV 101 capillary column in conjunction with methyl n‐decanoate as the internal standard. A calibrtion graph is employed to convert the sum of the α‐citral and β‐citral peak areas, relative to that of the internal standard, into citral content. Analysis of six commercial lemon oil samples is recorded, the results being expressed as perecentage citral content (g 100 ml−1) together with an indication of the relative abundance of the two isomers. The method is shown to be both accurate and reproducible.
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Gramshaw et al. (1980) studied this question.
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