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Citation: Li Xue-Gang, Zhao Guo-Xi. Interactions of Surfactants with Metallic Cations[J]. Acta Physico-Chimica Sinica, ;1991, 7(03): 345-348. doi: 10.3866/PKU.WHXB19910317 shu

Interactions of Surfactants with Metallic Cations

Li Xue-Gang ,
Zhao Guo-Xi

1.
Chemistry Department, Peking University, Beijing 100871

Received Date: 22 February 1990
Available Online: 15 June 1991

The concentration (c)-voltage (V) relations of K~+ and Ca~(2+) in surfactant solutions have been measured by ionic selective electrodes. The results show that it is very easy to form ion-pair, for alkyl sulfate(RS)and metallic cations which is the reason why the eletrolyte tolerance of RS is very low; The situation between the polyoxyethylene group in alkylpolyox yethylene ether sulfate salts (RE_nS) and multivalent metallic cations (Mn~(n+)) may be considered as the interaction performed by complexation, which prevents RE_nS and M~(n+) to form ion-pair, and this is one of the reasons why RE_nS have a higher eletrolyte tolerance.
- Surfactant; Alkylpolyoxyethylene ether sulfate; Metallic ionsurfactant interaction
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