9
We evaluated the effectiveness of the Rt-XLSulfur
™
column by measuring trace sulfur
compounds in one domestic (US) and two imported brands of beer. The results from
headspace sampling of these products demonstrate the capability of the RT-XLSulfur
™
column and the Sulfinert
™
deactivated GC system to easily detect sulfur compounds at
the 20ppb level (Figure 9).
GC_FF00494
1m, 0.75mm ID Sulfinert
™
tubing
Rt-XLSulfur
™
100/120mesh (cat.# 19806)
Conc.:
headspace of a domestic (US) or imported
beer sample
Inj.:
1cc sample loop, 6-portValco
®
valve
Carrier gas:
helium
Flow rate:
10mL/ min.@ ambient temp.
Oven temp.:
60°C to 260°C@ 15°C/min. (hold 5min.)
Det. sensitivity: SCD, attn. x 1
Det. temp.:
800°C
1. hydrogen sulfide
2. methyl mercaptan
3. dimethyl sulfide and/or
ethyl mercaptan
4. unknown
Domestic Beer
ppb levels of hydrogen sulfide, dimethyl sulfide, and/or ethyl mercaptan andmethyl mercaptan in beer.
GC_FF00483
Higher amounts of dimethyl sulfide
and/or ethyl mercaptan, lower
amounts of hydrogen sulfide and
methyl mercaptan, compared to
the domestic beer.
GC_FF00487
Equivalent amounts of dimethyl sul-
fide and/or ethyl mercaptan, lower
amounts of hydrogen sulfide and
methyl mercaptan, compared to the
domestic beer.
Imported Beer (Mexico)
Imported Beer (Canada)
Figure 9
