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Published on: March 18, 2011
Determining MOSH and MOAH with High Sensitivity in Vegetable Oil─A New, Reliable, and Comparable Approach Using
Christopher Albert1,2, Hans-Ulrich Humpf2, Ludger Brühl1
1Federal Research Institute for Nutrition and Food, Department of Safety and Quality of Cereals, Working Group for Lipid Research, Max Rubner-Institut, Detmold D-32756, Germany.
Abstract:
A method for the analysis of saturated mineral oil hydrocarbons (MOSH) and aromatic mineral oil hydrocarbons (MOAH) has been developed to improve interlaboratory precisions especially for amounts below 10 mg/kg. This approach was adopted as the standard method DGF C-VI 22 (20) of the German Society of Fat Sciences. Therefore, this method was evaluated on different edible oils containing a variety of interfering biogenic substances. The precision data were determined in an interlaboratory trial with an international group of 14 laboratories from Germany, Austria, and Italy. Good reproducible relative standard deviations for total MOSH (12.5-20.7%) and total MOAH (12.4-39.5%) as well as HorRat values ranging between 1.1 and 2.3 for total MOSH and between 0.9 and 2.6 for total MOAH have been achieved. As some matrices showed residual interferences in the MOAH fraction, these substances were further analyzed by online high-performance liquid chromatography-comprehensive two dimensional gas chromatography with time of flight mass detection.
