浊度法测定阴离子表面活性剂的临界胶束浓度

TURBIDIMETRICAL DETERMINATION OF CRITICAL MICELLAR CONCENTRATIONS OF ANIONIC SURFACTANTS

本文用浊度法分别测定了四种阴离子表面活性剂的临界胶束浓度,其结果与其他几种方法的测定结果比较一致。另外,用浊度法测量了NaCl对一种表面活性剂的临界胶束浓度的影响,结果符合Corrin等人提出的关系式:lgCMC=α+blg(CMC+C_ )。

The critical micellar concentrations (CMCs) of four well-characterized anionic surfactants (sodium dodecylbezenesulfonate;sodium n-alkylsulfonate;petroleum sulfonate TRS10-80, Witco, US;and petroleum sulfonate YM-3, Yumen, China) are determined turbidimetrically. The principles and procedures of turbidimetrical determination of CMCs are presented. The turbidimetrical values of CMCs are in good agreement with that determined by several other techniques. The varying of CMC of TRS10-80 with NaCl concentration is investigated by turbidimetry and shown to follow the equation of Corrin et al., i. e., lg(CMC)=a+ blg(CMC+Cs).