Laura Marques (1),
William Andrews (1), Robert Foster (2), Maydelin Hernandez Espinosa
(1); (1) Molson Coors Canada, Toronto, ON, Canada; (2) Miller Coors,
Golden, CO, U.S.A.
An accurate analytical method for the identification and quantitation
of 1,2-propylene glycol in packaged and in-process beer is described.
The concentration of 1, 2-propylene glycol in beer was determined using a
simple methanol solvent extraction, using ethylene glycol as an added
internal standard, with detection by capillary gas chromatography.
Chromatographic separation of 1,2-propylene glycol was successfully
achieved using a Restek 30 meter, 0.53 mm ID, 1 µm df Stabilwax
(Crossbond Carbowax polyethylene glycol) column with detection by flame
ionization using a Thermo Fisher Trace 1300 instrument.
Laura Marques received a B.S. degree in chemistry from the
University of Western Ontario and diploma in Science Laboratory
Technology from Fanshawe College in London, ON, Canada. She began
employment at Diagnostix Inc. in 2001 as an R&D chemist working on
an effective mycotoxin regimen used in the national grain inspection
industry. Since November 2006, she has worked for Molson Coors Canada in
the role of chemist at the central laboratory. Laura is also a member
of the MBAA and in addition to serving on two ASBC subcommittees has
previously given presentations on flavor stability and EPR.