4. Conclusions
In order to conduct screening research regarding the levels of 3-
MCPD and 2-MCPD esters in edible oils, lipid fractions of margarines
and fish oils in form of dietary supplements available on
Polish market, the SGS “3-in-1” method based on mild alkaline
transesterification reaction was applied. The method exhibited
satisfactory values of basic parameters of analytical characteristics,
which allowed for ensuring the quality of obtained results.
Among all analyzed samples, bound 3-MCPD and 2-MCPD were
not detectable in cold-pressed, non-refined edible oils such as corn,
sesame, linseed or virgin olive oil. The lowest concentration of
desired analytes (0.18e0.30 mg kg1) were determined in refined
edible oils including popular in human diet rapeseed, sunflower
and olive oil. The highest levels of bound MCPD (0.63e1.3 mg kg1)
were present in shortenings and deep frying blend, which lipid
fraction contain mainly refined palm oil where these toxicants may
occur in high concentrations according to literature data. High
levels of bound MCPD detected in fish oils in the form of dietary
supplements (1.5e5.5 mg kg1) are probably related to the fact that