Publication detail

Decreased benzo(a)pyrene concentration in rapeseed oil packed in polyethylene terephtalate

ŠIMKO, P.

Original Title

Type

journal article - other

Language

English

Original Abstract

Commercially available rapeseed oil, the same oil additionally refined physically, and paraffin oil for comparison purposes were spiked with benzo(a)pyrene (BaP) at the level of 29.4, 34.3, and 50.4 mikrog kg-1, respectively, filled into polyethylene terephtalate (PET) cylindrical-shape receptacles, and the BaP concentrations were followed within 73 h by HPLC analysis. During this time, the BaP concentrations decreased to 22.9, 25.4, and 23.5 mikrog kg-1 due to sorption of BaP onto PET. Using a modified kinetic equation, diffusion coefficients of BaP in all oils were calculated. The values of the diffusion coefficients and distribution coefficients indicated that other compounds present in the oils competed with BaP and affected the rate of BaP diffusion in the oils and the extent of adsorption onto PET. Moreover, the curves of BaP concentration vs. time, obtained experimentally, exhibited oscillations in BaP concentrations around the adsorption curves calculated by the kinetic equation. This was observed especially at the initial stages of the experiments, with the subsequent establishing of steady equilibrium BaP concentrations between liquid and solid phases at the end of the experiments, which does not correspond with known theory of adsorption.

Keywords

Benzo(a)pyrene, polyethylene terephtalate, rapeseed oil, adsorption, kinetics, oscillation

Authors

ŠIMKO, P.

Released

11. 3. 2005

Publisher

Wiley

Location

Weinheim, Germany

ISBN

1438-7697

Periodical

European Journal of Lipid Science and Technology

Year of study

108

Number

State

Federal Republic of Germany

Pages from

187

Pages to

192

Pages count

BibTex

@article{BUT42560,
  author="Peter {Šimko}",
  title="Decreased benzo(a)pyrene concentration in rapeseed oil packed in polyethylene terephtalate",
  journal="European Journal of Lipid Science and Technology",
  year="2005",
  volume="108",
  number="3",
  pages="187--192",
  issn="1438-7697"
}