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Accumulation model for solutes leaching from polymeric containers

D R Jenke1, A V Martinez, L A Cruz

  • 1Baxter Healthcare Corporation, William B. Graham Science Center, Round Lake, IL.

Journal of Parenteral Science and Technology : a Publication of the Parenteral Drug Association
|July 1, 1993
PubMed
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A new model predicts leachable concentrations in polymeric containers by considering solubility and partitioning. This helps determine the maximum accumulation of substances migrating from plastics into solutions.

Area of Science:

  • Polymer science
  • Analytical chemistry
  • Chemical engineering

Background:

  • Leachables from polymeric containers can impact product quality and safety.
  • Predicting leachable concentrations is crucial for risk assessment and regulatory compliance.
  • Existing models may not fully account for all accumulation-limiting factors.

Purpose of the Study:

  • To develop and apply an accumulation model for predicting equilibrium leachable concentrations from polymeric materials.
  • To identify and quantify the key mechanisms limiting leachable accumulation.
  • To provide a predictive tool for estimating leachable levels based on material properties and conditions.

Main Methods:

  • An accumulation model was developed incorporating three limiting mechanisms: total available pool, solute solubility, and solute partitioning.

Related Experiment Videos

  • The model was applied to the leaching of solutes from a blend of styrene-butadiene-styrene block co-polymer and polypropylene.
  • Equations were derived relating solute partition coefficients (solvent-water and polymer-water) to accumulation predictions.
  • Main Results:

    • The model successfully predicted equilibrium solution concentrations of leachables.
    • The three accumulation-limiting mechanisms were quantified and shown to influence the maximum leachable concentration.
    • The developed equations enable prediction of leachable accumulation using container weight, solution volume, and solute partition coefficients.

    Conclusions:

    • The developed accumulation model provides a robust method for predicting leachable concentrations in polymeric containers.
    • Understanding solute partitioning and solubility is critical for accurate leachable accumulation prediction.
    • This model can aid in material selection and risk assessment for products stored in polymeric packaging.