07/21/2021   |  

Passive sampling offers more convenience than active sampling in terms of sampling preparation (there is none) and worker acceptance (really small samplers). They are generally an acceptable alternative to active samplers for specific compounds. 
 
Operating on the principle of diffusion, passive samplers (or diffusive badges) do not require an air sampling pump. With no calibration or other preparation required, the sampling process is usually as simple as label the sampler, clip in the worker’s breathing zone, open to sample, close to stop sampling, and ship to an accredited lab for analysis. 
 
Most passive samplers use the same or similar sorbent or chemistry as specified in active sampling methods. Good examples are SKC UMEx Passive Samplers for formaldehyde (UMEx 100), NO2/SO2 (UMEx 200), and ammonia (UMEx 300). Each contain tape that is treated with chemistry specified in OSHA and/or NIOSH active methods.   
 
Over many years of testing and use in the field, passive samplers have gained acceptance as a suitable alternative to active samplers for some compounds. Several passive samplers have been validated for specific compounds and uptake (sampling) rates determined and documented through rigorous studies by the manufacturer or OSHA. For example, OSHA has validated SKC VOC Chek 575 Passive Samplers for sampling compounds in eight of its methods. SKC has performed extensive validation work on its VOC Chek samplers for several other compounds. In addition, SKC VOC Chek 575 Passive Samplers offer many other advantages for users and labs.  
 
Interested in learning more about passive sampling? Register now for the free SKC WebIH Webinar: Passive Sampling: Concepts, Technology, & Applications, Tuesday, August 3, 2021, from 1:00 to 1:30 p.m. EDT. 

Register Now!