Passive Diffusion Sampling
Passive diffusion samplers are used to collect water samples from groundwater aquifers for analysis of specific chemical compounds. The samplers are hung from a cable and placed in monitoring wells at the well screen for periods of at least 14 days, or until equilibrium has taken place between the water in the sampler and surrounding groundwater. They operate by diffusion of contaminants across a polyethylene membrane. No purging or disposal of purge water is necessary, which can dramatically reduce field sampling costs. The passive diffusion samplers act as a filter, so field filtering is not necessary. In fact, passive diffusion bags (PDBs) will block potassium permanganate from samples for sites using it in their remediation processes.
ALS Environmental is a licensed manufacturer of passive diffusion samplers. We actively participate in the Interstate Technology Regulatory Council (ITRC) and have been instrumental in technological and regulatory advancements in this field.
ALS Environmental also provides air quality sampling equipment and media for lease or purchase. More information can be found in our air quality testing and consulting service section.
Fast and Safe Shipping
All orders are carefully packaged to ensure a safe delivery of your order. Orders are generally shipped UPS 2nd-Day Air and may either be billed normally or shipping may be billed to your own UPS account. Expedited shipping options available.