Sample storage, Analysis – SKC 590-400 Hydrogen Cyanide Passive Sampler User Manual
Page 3
Write stop time on pouch and sampler label.
Soda lime sorbent is very caustic. Wear gloves when
handling sampler and vial to avoid skin contact with
sorbent.
Perform this step immediately aft er sampling.
In a clean environment, free of hydrogen
cyanide and hydrogen sulfi de (interferent),
carefully remove plug from vial adapter on back
of sampler housing. Immediately screw open
end of sorbent vial clockwise into adapter until
secure (see inset 8A). Rotate entire assembly until
sorbent is draining from sampler to vial. Tap
sampler lightly. Ensure all sorbent is recovered
in the vial. Unscrew vial from vial adapter on
sampler housing and immediately screw cap
onto vial.
Mark sample vial(s) as appropriate and seal
in aluminized pouch. Ensure all required
information is marked on pouch label. Package
sample(s) and one blank sorbent vial in a padded
envelope. Send to a laboratory for analysis.
Note: Report sampling site temperature and
uncorrected atmospheric pressure.
Ensure sorbent vials are capped tightly.
HCN Passive Samplers are designed for single use only. Do NOT reuse HCN samplers.
Sample Storage
3 weeks at 68 F (20 C) in a clean environment in storage studies
Note: OSHA Method 1015 recommends that samples be sent to a laboratory as soon as
possible. If delay is unavoidable, store samples in a refrigerator as a precaution.
Analysis
Preparing the Sample
1. Remove sorbent vial from aluminized pouch. Mark sample identifi cation on
vial as needed. Remove cap from vial.
2. Add 3.5 ml of 18.0 MΩ-cm deionized (DI) water to vial.
3. Place vial in a mechanical rotator and rotate at approximately 40 rpm for 60
minutes.
4. Remove vial from rotator and allow 15 minutes for sett ling.
5. Filter 2 ml of sample and transfer the fi ltrate to a 2-ml glass autosampler vial.
Seal with PTFE cap.
Samples are analyzed using ion chromatography with electrochemical
detector. Sampling hydrogen cyanide in the presence of hydrogen sulfi de
may also require analysis for thiocyanate. See httmethods/validated/1015/1015.pdf for analytical conditions, interferences, and
calculations.
Vial Adapter
Sorbent
Sorbent Vial
8A
9:30
5:30