Introduction to passive sampling
Abstract Passive sampling is a technique based on spontaneous flow of chemical species from the sampled medium to a collecting medium called the passive sampler. The spontaneous flow between the two media could be due to various driving forces such as difference in concentration, partial pressure, temperature, electromotive forces etc. While there are many driving forces for transfer of analyte into the passive sampler, the most important one is the difference in the concentration of the analyte between the sampled medium and the sorbent in the passive sampler. This technique can be used to sample pollutants from various matrices such as air, water and soil.
This article was written by Tadeusz Gorecki and Suresh Seethapathy, University of Waterloo.
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