|SKC offers a complete selection of sorbent tubes designed specifically for solvent extraction specified in many OSHA, NIOSH, ASTM, and non-agency methods. Quality SKC Sorbent Tubes feature consistent sorbent mesh size, validation, and over 40 years of proven performance.|
How Sorbent Tube Sampling Works
Sorbent tube sampling is the NIOSH/OSHA approved method for collecting most
hazardous gases and vapors from the air. Federal law has established permissible
exposure limits (PELs) for workers' exposures to a variety of airborne chemical
hazards. These limits are specified in several ways: eight-hour time-weighted
averages (TWAs), Short-Term Exposure Limits (STELs), and Ceiling values. Eight-hour
TWA limits are specified for full-shift exposures. STELs are usually issued
as 15-minute exposure limits and Ceiling values are issued as peak levels not
to be exceeded at any time during the working day. Sorbent tubes have been
established as a reliable tool for each of these sampling requirements.
Collect sample with a sorbent tube.
Extract sample from sorbent.
Lab personnel remove the sorbent and extract the trapped chemical using solvents or heat.
The sample extracted from the tube is analyzed to determine the amount of chemical hazard present. A single tube may provide enough sample to permit several analyses.
|The worker is shown wearing a sorbent tube and a sample pump to determine her exposure to chemical hazards during the entire work shift.|
Consult the method or the SKC Air Sampling Guide to determine the appropriate sorbent tube to use for the chemical being sampled.
Just before sampling, use a scorer/breaker tool to uniformly break the ends of the sorbent tube to a 2 mm diameter or half the diameter of the tube body.
Keep the tube in a vertical position during sampling to prevent the possibility of channeling that can lead to undersampling.
The arrow on the tube indicates air flow direction and should point to the tube holder and pump. If no arrow is present, the smallest section should be near the tube holder.
|Ship the sample to a laboratory as soon as possible; avoid excessive heat and rough handling.|
Sorbent Tube Expiration Dates