Figure3:
Separationof glycolson theRtx®-BACPlus1column.
Figure4:
Gamma-butyrolactone (GBL) and internal standardalpha-
methylene-gamma-butyrolactone (AMGBL) onanRtx®-BACPlus1
column.
5
Time (min)
Time (min)
1.5
2
2.5
3
3.5
4
5
4.5
1.5
2
2.5
3
3.5
4
1
2
3
4
1
2
3
4
5
4.5
GC_CF1163
Columns: Rtx®-BACPlus1, 30m,0.32mm ID, 1.8μm (cat.#18004); Sample: 200μg/mLeachglycol in
methanol:water (40:60); Injection: 1µLsplit (split ratio20:1); Liner: Sky™4mmstraight inlet linerw/wool (cat.#
23300.1); Inj. Temp.: 260 °C;OvenTemp:60 °C (hold0min) to240 °Cat20 °C/min (hold5min);CarrierGas:He,
constantflow; LinearVelocity: 70cm/sec;Detector: FID@240 °C;Make-upGas:N
2
, 30mL/min; Instrument:
Agilent/HP6890GC;Notes: InjectionswereperformedmanuallywithaMerlinMicroshot injector (cat.#22229).
Columns:Rtx®-BACPlus1, 30m,0.32mm ID, 1.8μm (cat.#18004); Sample:Gamma-butyrolactone (GBL)
(cat.#34077)andalpha-methylene-gamma-butyrolactone (AMGBL) (cat.#34079); Injection:Headspace-
loop split (split ratio10:1); Liner: 1mm ID straight inlet liner (cat.#20972);Headspace-Loop: Inj. PortTemp.:
200 °C; Instrument: TekmarHT3; Inj. Time: 1min; TransferLineTemp.: 125 °C;ValveOvenTemp.: 125 °C;
SampleTemp.: 100 °C;SampleEquil. Time: 10min;VialPressure: 30psi;PressurizeTime:2min; LoopPressure:
20psi; LoopFill Time: 1min;Oven:80 °C (hold0min) to180 °Cat10 °/min (hold0min);CarrierGasHe,
constantflow; LinearVelocity:48cm/sec;DetectorFID@240 °C;Make-upGas:Nitrogen, 30mL/min;
InstrumentAgilent/HP6890GC;Notes: Samplewaspreparedby injecting1µLofeach standard intoacapped
headspacevial. Themassofeachcompound inside theheadspacevialwas1µg.Headspaceconcentrator
courtesyofTeledyneTekmar,Mason,OH.
Peaks
BACPlus1RT (min)
BACPlus2RT (min)
1. Ethyleneglycol
1.983
2.207
2. Propyleneglycol
2.323
2.433
3. 1,3-Propanediol
3.043
3.278
4. Diethyleneglycol
4.380
4.385
4.6
4.8
5
5.2
5.4
5.6
5.8
6
6.2
6.4
Time (min)
2
1
GC_CF1164
Peaks
1. GBL
2. AMGBL
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