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Related Experiment Videos

Composition of sodium cholate micellar solutions.

Emilio Bottari1, Alessio Buonfigli, Maria Rosa Festa

  • 1Dipartimento di Chimica, Università La Sapienza, P.le A. Moro 5, Box n. 34, Roma 62, 00185 Roma, Italy. emilio.bottari@uniroma1.it

Annali Di Chimica
|October 21, 2005
PubMed
Summary

Sodium cholate forms aggregates in solution, with even numbers predominating. This study investigated aggregate composition using electromotive force and solubility measurements.

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Area of Science:

  • Physical Chemistry
  • Solution Chemistry

Background:

  • Sodium cholate is a bile salt with amphipathic properties.
  • Understanding its aggregation behavior is crucial for applications in various fields.

Purpose of the Study:

  • To investigate the composition and aggregation behavior of sodium cholate solutions.
  • To determine the influence of ionic medium concentration on aggregate formation.

Main Methods:

  • Electromotive force measurements using galvanic cells with hydrogen, sodium, and lead amalgam electrodes.
  • Solubility measurements of lead (II) cholate in the presence of sodium ions.

Main Results:

  • Sodium cholate forms aggregates with varying compositions dependent on ionic strength and concentration.

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  • Even aggregation numbers were predominant, with a maximum observed number of 24.
  • Two species with odd aggregation numbers were identified but present in low percentages.

    • Conclusions:

    • The study confirms the formation of diverse sodium cholate aggregates in solution.
    • Aggregation number parity is influenced by solution conditions.
    • Findings provide insights into cholate salt behavior compared to other cholanic acid derivatives.