EST Encon Evolution - 3.16 Recommended Parameters

3.16 Recommended Encon Evolution Purge & Trap Parameters
USEPA Method 8260B
Valve Temperature 150
o
C
Transfer Line Temperature 150
o
C
Automatic Drain Sparge Vessel On
Bake Gas Bypass Off
Standby Flow Rate On @ 40ml/min
Trap Ready Temperature 35
o
C
MoRT Ready Temperature 39
o
C
Purge Flow Rate 40ml/min
Purge Flow Time 11 minutes
Dry purge Temperature Off
Dry purge flow rate 40ml/min
Dry Purge Flow Time 1 minute
Desorb Pressure Control On 5.0 (Note: Set to 1 to 2psi below the inlet head
pressure, no more than 10psi)
Desorb Flow Control Off
Desorb Preheat Temperature 245
o
C
Desorb Temperature 250
o
C
Desorb Time 0.5 minutes
Trap bake temperature 260
o
C
MoRT Bake Temperature 210
o
C
Trap Bake Flow 85ml/min = 5ml purge volume
30ml/min = 25ml purge volume
Trap Bake Time 6 minutes
Trap Bake Cycles 1
Purge Temperature (option) Off
Sparge Bake Temperature (option) On – Program: 40
o
C initial, hold for 3 minutes, ramp at
100
o
C/min to 110
o
C final temperature
Trap Back Pressure Equal to pressure at 40ml/min purge flow
TRAP DESORB, BAKE, AND CONDITION TEMPS (FROM SUPELCO).