Abstract
A rapid method was developed for estimating the oil content of sunflower seeds. The method consisted of placing a given number of seeds between layers of filter paper, pressing them by means of a laboratory hydraulic press, and measuring the weight of oil absorbed by the filter paper. The effects of pressure-load, time of pressing, types of absorbing paper, size of sample, and dehulling of the seed were studied and a recommended procedure adopted. The oil values obtained by the rapid method were approximately 73 per cent as high as those obtained by the standard Soxhlet procedure. Analyses of 117 sunflower seed samples by the two methods gave a correlation coefficient of + 0.852. The method is particularly suited to assessing of plant breeding selections for oil content because of its speed and its adaptability to small samples.
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