Direct determination of MCPD esters and glycidyl esters by ... - OVID

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Results for Commercial Refined Oils•MCPD monoesters are never found in deodorizedoils. This means that glycidol is not likely to be theprecursor of MCPD esters in oils.•MCPD diesters have been not found incommercial vegetable oils other than somesamples of palm oil.•The DGF test does not accurately predict theamount of MCPD esters in oil samples.16
DGF Method compared to LCMS methodSample IDDGFmethodrun atSGSTotalMCPDMonoestersmg/kg(DL=1)TotalMCPDDiestersmg/kg(DL=0.5)MCPDEquiv.by LCMSmg/kgTotalGlycidylEstersmg/kg(DL=0.1)GlycidolEquiv.mg/kgSample A : RBD Palm oil 7.74 nd 6.1 1.2 18.6 5.0Sample A after ADM TreatmentProcess2.85 nd nd 0.0 nd 0.0Sample B, Commercial Oil Blend 3.64 nd nd 0.0 9.9 2.7Sample B after ADM TreatmentProcess1.83 nd nd 0.0 nd 0.0DGF method predicts much higher MCPD concentrations than LCMSwhen MCPD esters are present.DGF Method still gives positive results even when MCPD andglycidyl esters are not present.17
Page 1: WIA YOUTH ELIGIBILITYDepartment: Of
Page 6: LC-TOFMS•Detects both mono- and d
Page 9 and 10: LC and TOF-MS conditions• HPLC Co
Page 11 and 12: 571 ppb Glycidyl Palmitate485 ppb G
Page 13 and 14: 7180 ppb 3-MCPD Palmitic-Palmitic D
Page 15: Typical Standard CurveGL, ng/mL 4.7
Page 19 and 20: MCPD Esters can form from hydrochlo
Page 22: Conclusions• The harsh chemistry

Direct determination of MCPD esters and glycidyl esters by ... - OVID

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