How to take a personal monitoring diffusive sample
Diffusive (or passive) sampling is widely used for monitoring personal exposure (e.g. to chemicals in the workplace), for large-scale environmental studies, and for indoor air monitoring.
By eliminating the requirement for a pump, passive sampling makes it easier and cheaper to collect the large number of samples required in many large-scale air monitoring programmes.
Passive devices are also unobtrusive, meaning the wearer is more likely to forget the sampler is present, and so behave normally.