Analysis, Validation, References – SKC 590-300 Nitrous Oxide Passive Sampler User Manual
Page 4: Ordering, Skc limited warranty and return policy
Form 40106 Rev 1404
Analysis
1. Remove cap from vial. Using the transfer funnel accessory, immediately pour
sorbent from vial into a 0.25-inch OD (0.194-inch ID) x 3.5-inch L thermal
desorption tube. Ensure end of tube facing downward contains a stainless steel
screen and glass wool separator to hold sorbent in place.
2. Aft er sorbent is transferred to the tube, remove funnel and immediately place
a stainless steel screen and glass wool separator into the open end of the tube.
3. Seal tube with PTFE caps or Swagelok
®
fi tt ings.
4. Thermally desorb the sample.
5. Analyze samples using a gas chromatograph (GC) with electron capture
detector (ECD).
* Thermal desorption tubes must be 0.25-inch O.D., 0.194-inch I.D., and a minimum length
of 3.5 inch (Perkin Elmer Thermal Desorber). Thermal desorption tube blanks that meet
these specifi cations are available from SKC (Cat. No. P226350).
Validation
The SKC Nitrous Oxide Passive Sampler has been validated over a concentration
range of 50 to 450 ppm (20 to 80% RH) and at time intervals from 15 minutes to
8 hours. This is described in detail in the validation report
1
. The average sampling
rate over the dose range of 12.75 to 890 ppm-hours was 0.81 ml/min with a standard
deviation of ± 12%. The sorbent was transferred to a Perkin Elmer thermal desorption
tube and then thermally desorbed into a GC with electron capture detection.
References
1
Kuhlman, C. and Coyne, L., Validation of Nitrous Oxide Using SKC Passive Sampler 590-300,
SKC Inc., Mar
Ordering
Description
Cat. No.
Nitrous Oxide Passive Samplers include empty sampler housings*,
secondary diffusion barriers, and sealed glass vials of 736 mg cleaned/
purged Molecular Sieve 5A sorbent, pk/5; limited shelf-life
590-300
Replacement Sorbent Vial, glass vial with PTFE-lined cap fi lled with
736 mg cleaned/purged Molecular Sieve 5A sorbent
590-268
* Samplers are non-sterile.
Analysis Accessories
Cat. No.
Transfer Funnel, aluminum, facilitates transfer of sorbent from vial to
0.25-inch OD thermal desorption tube
590-264
Thermal Desorption Tube, Perkin Elmer, 0.25 x 3.5 inch, includes screens
and end caps
P226530
SKC Limited Warranty and Return Policy
SKC products are subject to the SKC Limited Warranty and Return Policy, which
provides SKC’s sole liability and the buyer’s exclusive remedy. To view the com-