Migration study of phthalates from non-food plastic containers used in food preservation.
Level 5 - mechanism / opinion, no new human data
Benchtop chemical migration experiment without human subjects
PubMed 37809712 · doi:10.1016/j.heliyon.2023.e20002
What was done
Researchers investigated the migration of total phthalate acid esters (PAEs) from repurposed non-food plastic paint buckets into pap (a liquid food). They screened seven factors using a Plackett-Burman design, tested factor interactions via a full factorial design, established migration conditions with a face-centered composite design, and modeled migration kinetics using pseudo-first order, pseudo-second order, and intra-particle diffusion equations.
What was found
Temperature, pH, and contact time were identified as the most influential factors, exhibiting non-linear effects and interactions. Under simulated local use conditions (pap temperature > 70 °C, pH ≤ 4 or ≥ 10, and contact time > 2 h), total PAE release exceeded 50 µg/L. The migration kinetics followed a pseudo-second order model.
Why it matters
Repurposing non-food plastic containers such as paint buckets for hot and acidic liquid foods can lead to substantial migration of endocrine-disrupting phthalates into consumed food.
Limits
The abstract does not report replicate sample sizes, specific phthalate chemical subtypes, exact baseline polymer formulations, or direct human biomarker exposure.
Cited by
- supports Acidic and heated foods accelerate the leaching of endocrine-disrupting chemicals, such as BPA and phthalates, from plastic containers.