the software SHIMADZU CLASS VPTM 4.3. For organochlorines an
Electron Capture Detector (ECD) was used. Organophosphates
were detected using Flame Thermionic Detector (FTD). The carrier
gas was helium, unless otherwise stated. A Cpsil19cb (Varian)
column (50 m length, 0.25 mm internal diameter and 0.2 μm film
thickness) was used