Fig. 1.

Flowchart of PLE of PCB from Lina Blue (left upper) or Synechocystis (left lower). In both cases, alcohol-washed samples are mixed with Celite and subjected to PLE in a vessel on the E-916 speed extractor (right photograph). In each cycle, the vessel is filled with ethanol (∼20 ml) and heated at set temperature for 5 min under nitrogen and 100 bars and eluted with a flush of nitrogen gas.