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Determination of 3āMonochloropropane-1,2-diol and 2āMonochloropropane-1,3-diol (MCPD) Esters and Glycidyl Esters by Microwave Extraction in Different Foodstuffs
This
paper describes a method for the determination of 3-monochloropropane-1,2-diol
and 2-monochloropropane-1,3-diol (MCPD) esters and glycidyl esters
in various foodstuffs, which are isolated using microwave extraction.
The next step is based on alkaline-catalyzed ester cleavage. The released
glycidol is transformed into monobromopropanediol (MBPD). All compounds
are derivatized in free diols (MCPD and MBPD) with phenylboronic acid
and analyzed by gas chromatographyāmass spectrometry (GCāMS).
The method was validated for oils with a limit of quantitation (LOQ)
of 0.1 mg/kg, for chips and crisps with a LOQ of 0.02 mg/kg, and for
infant formula with a LOQ of 0.0025 mg/L. Recoveries of each sample
were controlled by standard addition on extracts before derivatization.
Quantitation was performed by the addition of isotopically labeled
glycidyl and 3-monochloropropane-1,2-diol (3-MCPD) esters