International standard indicator organism-scenedesmus obliquus was used as experimental organism, and Additive Index method was applied to calculate AI value.

• 以国际标准生物指示物斜生栅列藻为实验生物,采用相加指数法,在单一毒性基础上进行1:1的浓度配比实验,研究了丙酮与15种酮类化合物的联合毒性。