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Volatile Organics by EPA Method 8021A/502.2 on Rtx-502.2

ColumnRtx-502.2, 75 m, 0.45 mm ID, 2.55 µm (cat.# 10986)
with Universal “Y” Press-Tight Connector (cat.# 20405)
Sample
Diluent:RO water
Conc.:10 ppb in 5 mL
Injectionpurge and trap splitless
Purge and Trap
Instrument:Tekmar LSC3100 Purge and Trap
Trap Type:Vocarb 3000
Purge: 11 min, flow 40 mL/min
Dry Purge: 1 min, flow 40 mL/min
Desorb Preheat Temp.:245 °C
Desorb: 2 min @ 250 °C
Bake: 8 min @ 260 °C
Interface Connection:direct
Transfer Line Tubing:0.32mm ID Siltek Guard Column (cat.# 10027)
Oven
Oven Temp.:50 °C (hold 2 min) to 70 °C at 2 °C/min to 130 °C at 9 °C/min to 200 °C at 40 °C/min (hold 5 min)
Carrier GasHe
DetectorµGold Tandem PID/Hall
Reaction Gas Flow:7 mL/min
Ionization Potential:0.35 mV
Base Temp.:200 °C
InstrumentFinnigan 9001
NotesCarrier Gas: constant pressure @ ~ 10 mL/min.
Adjust dichlorodifluoromethane to a retention time of 2.28 min. @ 50°C on the Rtx-VGC column.

PID: makeup 7mL/min.
Hall2000: RxnGas 25mL/min., RxnTemp 940°C, Propanol Flow 470 μL/min.

Primary Column: Rtx-VGC, 75m, 0.45mm ID, 2.55μm (cat.# 19409)
AcknowledgementFinnigan 9001 GC, μGold Tandem Photoionization/HALL 2000 Electrolytic Conductivity Detector provided courtesy of Thermo Finnigan GC & GC/MS Division, 2215 Grand Avenue Pkwy, Austin, Texas 78728