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选取了合适的色谱分析条件,对已知含量的EPA和DHA标准品进行分析,得到很高的总脂肪酸(TFA)回收率和精密度,表明本色谱条件的重现性很好。试验结果表明:直接甲基酯化法最优酯化温度为100℃,最优反应时间为30min;用直接甲基酯化法处理过的深海鱼油TFA回收率可达到97.3%,而传统合成法则只能达到80.2%。 相似文献
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An apparatus,desinged to simulate bubbling of a sieve tray operated in froth regime,was employed. Bubble contact angles in and above the incipient weeping regimer for an air-water-plexiglas system were investigated. The influence of both liquid cross-flow and gas up-flow upon bubble contact angles was examined. A model considering the influence of liquid cross-flow was developed to predict bubble size from a sieve hole in froth operation regime.The comparison shows that the bubble sizes predicted by the present model are consistent with our experimental values and the available published experimental data. 相似文献
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INTRODUCTION
The palmitoleic acid and 9,12-octadecadienoic acid contained in peanut oil are two kinds of useful pharmaceutical materials in a traditional Chinese medicine, which is used to treat many skin diseases[1-3], such as Verruca vulgaris and Codyloma acuminanta. However, the separation of the above-mentioned pharmaceutical compositions by conventional distillation is always undesirable:high operation temperature at which harmful decomposition reactions take place,residuel with offensive odor and scorch in reboiler. In this work, short path distillation (SPD) was used to separate the medicinal materials from peanut oil. The separation conditions were studied. 相似文献
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