Semipermeable membrane device (SPMD)

What is Semipermeable membrane device (SPMD)?

Semipermeable membrane device (SPMD) meaning A long strip of low-density, polyethylene tubing filled with a thin film of purified lipid such as triolein that simulates the exposure to and passive uptake of highly lipid-soluble organic compounds by biological membranes.

 

reference: USGS – National Water-Quality Assessment (NAWQA) Project