We have determined surface tension, cmc, isoelectric zone, foam property, wetting property, emulsification, Krafft point, thickening property and hard waterresisting property of the four kinds of amphoteric surfactants (BS 12, OB 2, LAB, LAO).

• 本文测定了四种两性表面活性剂（BS－12，OB－2，LAB，LAO）的表面张力、临界胶束浓度（cmc）、等电区、发泡能力、润湿性、乳化作用、Kraft点和增稠性能；