Question

determine of the critical micelleconcentration of surfactant by conductometric

Answer 1

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Answer 2

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The CMC (critical micelle concentration) is the concentration of a surfactant in a bulk phase, above which aggregates of surfactant molecules, so-called micelles, start to form. The CMC is an important characteristic for surfactants. The surface tension of a sample with an unknown surfactant concentration is measured in Online-Mode or in Single-Mode using the determined bubble lifetime (30 ms). Based on the reference curve the corresponding surfactant concentration is assigned to the measured surface tension (influence of surface active agents).