Automated Determination of 3-MCPD and Glycidol in Edible Oils

3-MCPD and Glycidol and their fatty acid esters are process contaminants that are formed, when edible oils and fats are refined. At least some of the above-mentioned substances are classified as potential human carcinogens, a fact which has prompted the introduction of rules and regulations. A GERSTEL AppNote describes a solution for fully automated determination of 3-MCPD and Glycidol in edible oils based on the reliable indirect method DGF C-VI 18 (10), similar to the ISO 18363-1 and AOCS
Cd 29c-13 methods that are essentially identical.

It is demonstrated that method ISO 18363-1, which is equal to both method AOCS Cd 29c-13 and method DGF C-VI 18 (10), can be automated using the GERSTEL MPS. The obtained results show good correlation with reference data. The excellent standard deviations achieved for the complete sample preparation and analysis workflow speak in favor of automation. In this nite it is shown that method ISO 18363-1 can be automated using the GERSTEL MPS and that the results obtained correlate well with reference data.
This method is similar to two other frequently used methods: AOCS Cd 29c-13 and DGS C-VI 18 (10). The excellent relative standard deviations achieved for the complete process including GC/MS analysis speak in favor of the presented automation solution.
The work presented here involves an automated evaporation step as prescribed in the abovementioned official methods. This ensures that for most matrices, the required limits of detection can be reached using a single quadropole mass spectrometer (MSD).
A further important aspect of the evaporation step is that it removes excess derivatization reagent, which could otherwise build up in the GC/MS system and influence system stability.

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