Organic Denuder Rejuvenation - BRECHTEL 4001-115V Instrument Manual

8. allow the denuder to dry either by sitting overnight in a laminar flow hood or
by passing dry, filtered, chemically-scrubbed air through it
9. visually verify that no water droplets remain inside the denuders
10. dry the solid end caps
11. replace one end cap on each denuder
12. add 50 ml of the acidic-gasses coating solution to the denuder labeled for use
with acidic-gasses and install the second solid end cap
13. rotate for 1 minute and remove the liquid (dispose of properly)
14. allow the denuder to dry under a clean hood or pass dry, filtered, chemically-
scrubbed air through it.
15. repeat the last three steps on the second denuder with the basic-gasses coating
solution

9.10 Organic Denuder Rejuvenation

The square cross-section aluminum organic vapor denuder contains fifteen carbon-impregnated
paper strips that should be replaced on an annual basis. New strips may be purchased
from BMI. Be sure to remove fibers from the new strips using clean, compressed air to
blow them off prior to installation.
To replace the carbon paper strips follow these steps:
1. remove the organic vapor denuder from the sample inlet
2. remove the four screws holding the end plate on the inlet side with the fitting,
do not remove the other end plate
3. carefully slide the cartridge of strips out of the aluminum body
4. blow out the aluminum body with clean compressed air, visually checking that
no contamination remains
5. remove the old paper strips from the cartridge assembly
6. blow dry or wipe with methanol the cartridge assembly with strips removed
83-00009-01A
9.10 Organic Denuder Rejuvenation
PILS 4001-115V and 4001-230V Page 65 of 74