文章介绍了YUS—3加强型酸价快速测定仪的分析测定原理及测定条件的选择，并与GB5530—85“酸价测定法”进行了对照。结果表明：用该仪器测定植物油脂酸价，废液中KBr和表面活性剂的浓度应分别控制在14%以上和0．2％以下，量取试样要准确．并采用混合指标剂．仪器测定误差在允 This article introduces the principle of determination and determination of YUS-3 enhanced acid fast detector and the choice of measurement conditions, and with GB5530-85 “acid value determination method” were compared. The results showed that using this instrument to determine the acid value of vegetable oil, the concentration of KBr and surfactant in the waste liquid should be controlled respectively above 14% and below 0.2%, and the sample should be taken accurately. And mixed indicator. Instrument measurement error allowed