A cikin kwalta ta emulsified, ƙimar pH kuma tana da wani tasiri akan ƙimar demulsification. Kafin yin nazarin tasirin pH akan ƙimar ƙarancin kwalta na emulsified, ana bayyana hanyoyin lalata kwalta na anionic emulsified kwalta da cationic emulsified kwalta bi da bi.

Cationic emulsified kwalta demulsification ya dogara da tabbataccen cajin nitrogen atom a cikin rukunin amine a cikin tsarin sinadarai na emulsifier na kwalta don zama alaƙa da mummunan cajin jimillar. Don haka, ruwan da ke cikin kwalta na emulsified ana matse shi kuma ya juye. An kammala lalata kwalta na emulsified. Saboda gabatarwar pH-daidaita acid zai haifar da karuwa a cikin caji mai kyau, yana rage jinkirin haɗuwa da ingantaccen cajin da aka yi da emulsifier na kwalta da tarawa. Sabili da haka, pH na cationic emulsified kwalta zai shafi ƙimar demulsification.
Mummunan cajin na anionic emulsifier kanta a cikin anionic emulsified kwalta ya keɓanta ga juna tare da mummunan cajin jimillar. Demulsification na anionic emulsified kwalta ya dogara da manne da kwalta kanta zuwa ga matsi daga ruwa. Anionic kwalta emulsifiers gaba daya dogara ga oxygen atom su zama hydrophilic, da oxygen atoms samar hydrogen bond tare da ruwa, haifar da evaporation na ruwa rage gudu. Ana haɓaka tasirin haɗin gwiwar hydrogen a ƙarƙashin yanayin acidic kuma yana raunana a ƙarƙashin yanayin alkaline. Saboda haka, mafi girma pH, da sannu a hankali da demulsification kudi a anionic emulsified kwalta.