P2016-MRT

MOSH/MOAH in edible oils

Edible oils are part of the current EU monitoring related to MOSH and MOAH. However, the quantification of low levels of MOSH and MOAH in matrices with high fat/oil content remains challenging. Suitable sample pre-treatment and clean-up steps (e.g. saponification, epoxidation) must be applied in order to achieve correct results.

P2016-MRT is designed to cover low levels of MOSH and MOAH in rapeseed oil and sunflower oil. The edible oils are spiked with adequate well-characterised oils, containing MOSH and MOAH. LOQs of 1 mg/kg are required for participation.

P2016-MRT is organised as a method ring test. That means, the evaluation is not limited to the pure statistical evaluation of the provided analytical data. Consequently, 

  • all participants are asked to provide the chromatograms of both test samples and blank samples including the integration of the humps. All chromatograms are published (anonymised with the lab code) in the final report.
  • questionnaire is provided related to the analytical details like internal standards, sample-pretreatment, etc. and related to the confirmation of the results.

The analytical details, which are mentioned above as well as the chromatogramms are summarised in separate parts of the final report. For reasons of fairness, only those participants, which provide details and chromatograms will receive these parts of the report. These data, anonymised and summarised, will help to identify shortcomings, built the basis for further discussion and thus help to enhance the quality of the applied methods.

The analytical results are evaluated with respect to

  • the comparability criterion (z-score), and
  • the trueness criterion (recovery of the spiked level, as far as scientific reasonable).

Parameters

Test material sunflower oil

MOSH ≥ n-C10 - ≤ n-C16, MOSH > n-C16 - ≤ n-C20, MOSH > n-C20 - ≤ n-C25, MOSH > n-C25 - ≤ n-C35, MOSH > n-C35 - ≤ n-C40, MOSH > n-C40 - ≤ n-C50, Total MOSH (lower bound), Total MOSH (integration of hump), MOAH ≥ n-C10 - ≤ n-C16, MOAH > n-C16 - ≤ n-C25, MOAH > n-C25 - ≤ n-C35, MOAH > n-C35 - ≤ n-C50, Total MOAH (lower bound), Total MOAH (integration of hump)

Test material rapeseed oil

MOSH ≥ n-C10 - ≤ n-C16, MOSH > n-C16 - ≤ n-C20, MOSH > n-C20 - ≤ n-C25, MOSH > n-C25 - ≤ n-C35, MOSH > n-C35 - ≤ n-C40, MOSH > n-C40 - ≤ n-C50, Total MOSH (lower bound), Total MOSH (integration of hump), MOAH ≥ n-C10 - ≤ n-C16, MOAH > n-C16 - ≤ n-C25, MOAH > n-C25 - ≤ n-C35, MOAH > n-C35 - ≤ n-C50, Total MOAH (lower bound), Total MOAH (integration of hump)

Expected time schedule

Please register before:
01 March 2020
Dispatch of samples:
04 May 2020
Deadline for reporting results:
28 May 2020

Costs of P2016-MRT

Ring test and material Amount Price per unit
MOSH/MOAH in edible oils 900 €
Test material sunflower oil 80 ml included
Blank material sunflower oil 80 ml 70 €
Test material rapeseed oil 80 ml included
Blank material rapeseed oil 80 ml 70 €

Note: PROOF-ACS reserves the right to cancel tests in case of less than ten participants.