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Sampling, Identification and Characterization of Microplastics Release from Polypropylene Baby Feeding Bottle during Daily Use
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Solving a microplastic dilemma? Evaluating additive release with a dynamic leaching method for microplastic

James H Bridson1,2, Robert Abbel1, Dawn A Smith1

  • 1Scion, Titokorangi Drive, Private Bag 3020, Rotorua 3046, New Zealand.

Methodsx
|May 31, 2023
PubMed
Summary

A new method, Dynamic Leaching Method for Microplastic Assessment (DyLeMMA), accurately measures microplastic additive release under environmental conditions. This dynamic approach provides crucial data for understanding plastic pollution kinetics.

Keywords:
AdditiveDyLeMMA: Dynamic Leaching Method for Microplastic AssessmentExtractableIntentionally added substanceLeachableNon-intentionally added substancePlastic pollutionRelease kinetics

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Area of Science:

  • Environmental Science
  • Analytical Chemistry
  • Polymer Science

Background:

  • Microplastics and their additives are significant environmental contaminants.
  • Traditional static leaching methods may not accurately reflect real-world environmental conditions like dilution or percolation.
  • There is a need for more environmentally relevant methods to assess additive release from microplastics.

Purpose of the Study:

  • To evaluate and refine methods for assessing microplastic additive leaching under environmentally relevant sink conditions.
  • To develop and validate a dynamic leaching method for microplastics.
  • To provide data suitable for modeling microplastic additive release.

Main Methods:

  • Evaluated three different approaches for assessing additive leaching under sink conditions.
  • Developed and validated the Dynamic Leaching Method for Microplastic Assessment (DyLeMMA).
  • Utilized high-resolution liquid chromatography-mass spectrometry for targeted additive quantification and screening for non-intentionally added substances.

Main Results:

  • DyLeMMA successfully maintained sink conditions throughout the test duration for four different plastics.
  • The method avoided solubility-limited release, ensuring environmental relevance.
  • Minimized background contamination, enhancing sensitivity and specificity for additive detection.

Conclusions:

  • DyLeMMA is an environmentally relevant, dynamic leaching method for microplastics.
  • The method is simple, fast, cost-effective, and suitable for fitting release models.
  • DyLeMMA provides valuable data for understanding microplastic leaching kinetics and mechanisms.