What types of environmental media can be sampled by SPMDs and POCIS?
SPMDs can be used to sample air (vapor phase), water (surface groundwater) and sediment-soil (pore water and vapors). They have been used in a wide range of environments, i.e from the tropic to the Arctic and Antarctic, and in highly turbulent systems to stagnant backwater areas. POCIS are normally used to sample water.