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Passive samplers

Detailed Description

Three types of passive samplers used for tracking toxins in the Columbia River. 1) Semi-Permeable Membrane Device (SPMD) is samples liquid of fat-soluble organic compounds. 2) Polar Organic Compound Integrating Sampler (POCIS) samples water-soluble organic chemicals. 3) Solid-Phase Adsorption Toxin Tracker (SPATT) samples dissolved cyanotoxins associated with harmful algal blooms. 

Sources/Usage

Public Domain.