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参照液体（韦氏）比重天平的测定原理，确定了一种利用常用分析天平准确、简便、快速地测定植物油相对密度的方法——分析天平法．结果表明，用该法成批测定植物油的相对密度较比重瓶法更准确、快速．
With reference to the determination principle of liquid (Wechsler) specific gravity balance, a method for determining the relative density of vegetable oil accurately, conveniently and rapidly by using common analytical balance was established. The results showed that the relative density of vegetable oil determined by this method was more accurate and rapid than that of pycnometer.