Remove sodium lauryl sulfate from an aqueous solution can using s-alkilizotiurony chlorides. You can take the s-benzilizotiurony chloride. Sodium lauryl sulfate with these substances forms in acidic or neutral environment white crystals. Their you are separated from the solution by filtration.

Dear Yuri Mirgorod

Thanks a lot for your help

best regards

same should work with cationic surfactants like CTAB, however, I would be afraid of killing the microbes. Adsorption to ion exchange resin maybe more gentle. But same as filtration part of microbes maybe removed. ???

Dear Dr. Titus Sobisch

Thanks for your kindly guidance.

Your right.

I am afraid about the pH of the buffer after adding these materials to buffer. because I should perform my test in pH=7.0

I can investigate this subject. How ever thank you very much

best regards